X9 2015-2016

Authors:Robert Green (GFZ German Research Centre for Geosciences, Potsdam, Germany), Christoph Sens-Schönfelder (GFZ German Research Centre for Geosciences, Potsdam, Germany), Nikolai Shapiro (Institut de Physique du Globe de Paris, Paris, France), Ivan Koulakov (Trofimuk Institute of Petroleum Geology and Geophysics, Novosibirsk, Russia)
Abstract:The KISS network was installed in the frame of the “Klyuchevskoy Investigation - Seismic Structure of an extraordinary volcanic system” project and recorded data between summer 2015 and summer 2016 in one of the world’s largest clusters of subduction volcanoes - the Klyuchevskoy volcanic group (KVG). It is located in eastern Russia at the northern end of the Kuril-Kamchatka subduction zone close to its intersection with the Aleutian arc and the north-western termination of Hawaii-Emperor seamount chain. Additional to the 4700m high Mount Klyuchevskoy the KVG contains 12 other volcanoes that have together erupted about 1 cubic meter rock per second averaged over the past 10,000 years. Among those Klyuchevskoy, Bezymianny and Tolbachik were the most active ones during the last decades with eruptions styles ranging from explosive to Hawaiian-type. The KISS experiment is designed to investigate the volcanic and seismic processes and its structural setting in the KVG. The network covers a circular region of about 80km diameter with some linear extensions. It includes data from 77 temporary seismic stations with broadband and short period sensors that were installed on concrete plates in about 60cm deep holes. Due to the local conditions the stations were battery powered and could not be serviced during the experiment. GPS reception of the digitizers was not continuous at all stations due to thick snow cover and vegetation. Waveform data are available from the GEOFON data centre, under network code X9, and are embargoed until end of 2019.
Citations:

Recommended citation for the data report:

Green, R., Sens-Schönfelder, C., Shapiro, N., & Koulakov, I. (2021). X9 2015-2016. GFZ German Research Centre for Geosciences. https://doi.org/10.48440/GFZ.B103-21019

If you use the GEOFON dataset described in this report, please use the following citation:

Shapiro, N. M., Sens-Schönfelder, C., Lühr, B. G., Weber, M., Abkadyrov, I., Gordeev, E. I., Koulakov, A., Jakovlev, A., Kugaenko, Y. A., & Saltykov, V. A. (2015). Klyuchevskoy volcanic group experiment (KISS). GFZ Data Services. https://doi.org/10.14470/K47560642124

The raw unprocessed data are archived as assembled dataset and should be cited as:

Shapiro, N. M., Sens-Schönfelder, C., Lühr, B.-G., Weber, M., Abkadyrov, I., Koulakov, I., Jakovlev, A., Kugaenko, Y. A., & Saltykov, V. (2021). Klyuchevskoy volcanic group experiment (KISS): Supplemantary data of the passive seismological measurement [Data set]. GFZ Data Services. https://doi.org/10.5880/GIPP.201505.1

Introduction

To undertake a large- scale seismological investigation of the Klyuchevskoy Volcanic Group (KVG), we formed a consortium of institutions from Russia, France, and Germany and designed the KISS experiment. We operated a temporary network of 83 seismographs between August 2015 and July 2016. An EOS article about the experiment is available from Shapiro et al. (2017, https://doi.org/10.1029/2017EO071351 ).

As part of the KISS project (“Klyuchevskoy Investigation - Seismic Structure of an extraordinary volcanic system”), the deployment of temporary stations was designed to complement the permanent etwork of the Kamchatka Branch of the Geophysical Survey of Russia. The waveform data from the permanent stations during the concurrent recording period is available from the GEOFON data centre under network code D0. Due to terms of the project, authorisation must be granted to access this restricted dataset (D0).

Data Acquisition

Experimental Design and Schedule

The station distribution is shown in Fig. 1, and Table 1 summarises the most important information about each station.

Site Descriptions

Both broadband and short period sensors were installed on cemnet founded concrete plates in about 60cm deep holes. Due to the local conditions the stations were battery powered and could not be serviced during the experiment. GPS reception of the digitizers was not continuous at all stations due to thick snow cover and vegetation.

Instrumentation

Stations for this network were partly supplied through a GIPP equipment loan: http://gipp.gfz-potsdam.de/webapp/projects/view/507

Table 1 summarises the most important information about each station.

Sensor orientation

Sensors in the KISS experiment were oriented using a compass and the location estimated using a GPS. To assess the accuracy of the sensor orientation a second reference location was measured with GPS at some distance in the north-direction indicated by the deployed sensor. Locations of these reference points are listed in table Table 2. In some cases the reference point could not be taken due north because of topographic circumstances. In these cases the reference point was taken in the directions that the deployed sensor indicated as south which is indiceted in the last column of Table 2. In some cases it was not possible to measure the location of a reference point at all.

Data Description

Data Completeness

Fig. 3 shows the uptime of each stations.

Data Processing

Data of this dataset is not processed. However, format conversion was necessary. In the case of station opearted with Omnirecs Cube digitizers the conversion involves a resampling of the data to correct the actual sampling rate of the digitizer that is determined by the internal clock only to a proper constant sampling rate. This conversion and resampling was done using the GIPP tools https://www.gfz-potsdam.de/en/section/geophysical-deep-sounding/infrastructure/geophysical-instrument-pool-potsdam-gipp/software/gipptools/ with the cube2mseed option –fringe-samples=NOMINAL. Raw data recorded by the Omnirecs Cube digitizers can be accessed as a supplementary dataset.

Data quality and Noise Estimation

Fig. Fig. 2 shows noise probability density functions for all channels.

Timing Accuracy

The timing accuracy of the dataset was assessed with the methodology described in Sens-Schönfelder (2008). Synchronizing seismic networks with ambient noise, Geophysical Journal International, 174, 966–970, https://doi.org/10.1111/j.1365-246X.2008.03842.x

No systematic timing errors were found in the dataset indicating that the GPS tags were frequent enough for the linear drift correction to provide timing accuracy below the resolution of the noise method. For the Cube digitizers the daily number of GPS locks are illustrated in Fig. 4. Time periods with low numbers indicate impaired GPS signal due to vegetation or snow.

Data Access

File format and access tools

The data are stored in the GEOFON database, and selected time windows can be requested by EIDA access tools as documented on http://geofon.gfz-potsdam.de/waveform/ . Normally the data are delivered in miniseed format. The current data access possibilities can always be found by resolving the DOI of the dataset.

Raw Data and Pictures of the Station Locations

A supplementary dataset including pictures of the station locations and the raw files recorded by the DataCube recorders is archives at the GIPP ( http://doi.org/10.5880/GIPP.201505.1 ).

Availability

Data are embargoed until 12/2019 and are then open.

Acknowledgments

The KISS experiment was supported by the Russian Science Foundation (grant 14- 47- 00002), the French project Labex UnivEarth, and the Université Sorbonne Paris Cité project VolcanoDynamics. Sixty seismographs were provided by Geophysical Instrument Pool Potsdam (GIPP) from the Helmholtz Center Potsdam- GFZ German Research Centre for Geosciences, and 23 were provided by the partner institutions from the Russian Academy of Sciences: the Institute of Volcanology and Seismology, the Trofimuk Institute of Petroleum Geology and Geophysics, and the Kamchatka Branch of the Geophysical Survey. KISS data are stored in the GFZ Seismological Data Archive operated by the GEOFON program and will be openly available after a 3-year embargo period. We are grateful to Sergey Abramenkov, Benjamin Heit, Pavel Kuznetsov, Ekaterina Kukarina, Roman Kulakov, Alexey Kotlyarov, Valeriy Gladkov, Petr Voropaev, Dmitry Droznin, Sergey Senyukov, and Vitaly Bliznetsov, who participated in the fieldwork. Special thanks are owed to Sergey Chirkov for providing field photographs and to the truck driver, Igor Uteshev, as well as to the helicopter pilot, Gennady Kroshkin.

Table 1 Station table. Note that start and end times represent the maximum validity of the corresponding configurations, not the actual data availability or time in the field. Azi: Azimuth of north or ‘1’ component.
Label Lat Lon Ele Azi Rate Sensor ID Logger Id Start End Channels
B01 56.00501 160.3316 1532.7 90 100 CME4011 0569 BAIKAL 0052 2015-08-09 2015-09-01 SHZ SHN SHE
B02 56.14483 160.3323 1354.5 90 100 CME4011 xxxx BAIKAL 0112 2015-08-09 2015-09-24 SHZ SHN SHE
B04 56.22241 160.6878 1132.4 90 100 CME4011 xxxx BAIKAL 0063 2015-08-09 2016-02-07 SHZ SHN SHE
B05 56.11511 160.753 1377.5 90 100 CME4011 xxxx BAIKAL 0053 2015-08-10 2015-09-25 SHZ SHN SHE
B07 55.98589 160.679 1511.0 90 100 CME4011 0719 BAIKAL 0132 2015-08-10 2015-09-07 SHZ SHN SHE
B08 55.93296 160.6059 1429.8 90 100 CME4011 xxxx BAIKAL 0101 2015-08-09 2015-08-14 SHZ SHN SHE
B09 56.19013 160.678 1268.1 90 100 CME4011 0707 BAIKAL 0095 2015-08-09 2016-04-03 SHZ SHN SHE
IR1 55.71783 160.305 1160.8 90 50 Trillium Compact C021 CUBE 0821 2015-08-03 2016-07-06 HHZ HHN HHE
IR10 55.11955 159.9534 267.2 90 50 Trillium Compact C034 CUBE 0832 2015-08-07 2016-07-16 HHZ HHN HHE
IR11 56.01252 160.8918 581.3 90 50 LE-1D/1 1181 CUBE 0833 2015-08-07 2016-07-07 SHZ SHN SHE
IR12 55.92607 160.8755 539.7 90 50 Trillium Compact C036 CUBE 0834 2015-08-07 2016-07-07 HHZ HHN HHE
IR13 55.84251 160.861 540.8 90 50 LE-1D/1 1183 CUBE 0835 2015-08-07 2016-07-07 SHZ SHN SHE
IR14 55.76649 160.7767 1019.9 90 50 Trillium Compact C037 CUBE 0836 2015-08-07 2015-08-10 HHZ HHN HHE
IR15 55.68777 160.6998 762.4 90 50 LE-1D/1 1184 CUBE 0837 2015-08-06 2015-08-15 SHZ SHN SHE
IR16 55.65167 160.5026 433.4 90 50 Trillium Compact C049 CUBE 0838 2015-08-06 2015-08-10 HHZ HHN HHE
IR17 56.17823 160.4075 1067.8 90 50 CMG-6TD T6E02 CMG-6TD yyyy 2015-08-09 2016-05-03 HHZ HHN HHE
IR18 56.20044 160.5937 1065.8 90 50 CMG-6T T6Q75 CUBE 0ADE 2015-08-09 2016-07-06 HHZ HHN HHE
IR19 56.1739 160.7529 939.0 90 50 CMG-6T T6Q76 CUBE 0ADF 2015-08-09 2015-09-15 HHZ HHN HHE
IR2 55.78518 160.2323 1065.8 90 50 LE-1D/1 1879 CUBE 0822 2015-08-07 2016-07-06 SHZ SHN SHE
IR20 56.10005 160.8278 939.0 90 50 CMG-6TD T6E09 CMG-6TD yyyy 2015-08-08 2016-07-05 HHZ HHN HHE
IR3 55.85794 160.2253 1108.4 90 50 Trillium Compact C028 CUBE 0823 2015-08-07 2016-07-06 HHZ HHN HHE
IR4 55.95746 160.2364 986.4 90 50 LE-1D/1 2831 CUBE 0824 2015-08-08 2016-07-08 SHZ SHN SHE
IR6 56.11173 160.2691 1317.6 90 50 LE-1D/1 1169 CUBE 0828 2015-08-07 2016-07-06 SHZ SHN SHE
IR7 55.34756 160.5838 1469.3 90 50 Trillium Compact C031 CUBE 0829 2015-08-08 2016-07-05 HHZ HHN HHE
IR8 55.2311 160.0802 505.1 90 50 LE-1D/1 1177 CUBE 0830 2015-08-08 2015-08-22 SHZ SHN SHE
IR9 55.31187 159.8641 1089.8 90 50 Trillium Compact C032 CUBE 0831 2015-08-08 2016-02-08 HHZ HHN HHE
OL1 55.87776 159.358 144.0 90 50 LE-1D/1 1338 CUBE 0861 2015-08-10 2015-09-06 SHZ SHN SHE
OL2 55.88874 159.5436 63.7 90 50 Trillium Compact C016 CUBE 0862 2015-08-09 2015-12-12 HHZ HHN HHE
OL3 55.43862 159.6771 82.8 90 50 LE-1D/1 1340 CUBE 0863 2015-08-07 2016-07-15 SHZ SHN SHE
OL4 55.54932 159.4542 145.9 90 50 LE-1D/1 1345 CUBE 0866 2015-08-10 2016-05-02 SHZ SHN SHE
OL5 55.2918 159.5659 113.0 90 50 Trillium Compact C063 CUBE 0867 2015-08-07 2015-10-11 HHZ HHN HHE
OL6 55.30176 160.2785 1052.6 90 50 Trillium Compact C064 CUBE 0868 2015-08-07 2016-05-26 HHZ HHN HHE
OL7 56.15683 161.5087 893.4 90 50 CMG-6T T6Q73 CUBE 0ADH 2015-08-09 2015-10-08 HHZ HHN HHE
OL8 56.17911 161.7836 9.9 90 50 CMG-6TD T6D98 CMG-6TD yyyy 2015-08-31 2016-07-06 HHZ HHN HHE
OL9 56.28348 162.1685 30.0 90 50 CMG-6TD T6D99 CMG-6TD yyyy 2015-09-01 2016-07-07 HHZ HHN HHE
OR1 55.96538 159.8044 48.9 90 50 Trillium Compact C007 CUBE 0764 2015-08-04 2016-04-09 HHZ HHN HHE
OR10 56.05063 161.2135 44.2 90 50 Trillium Compact C012 CUBE 0773 2015-08-06 2015-08-26 HHZ HHN HHE
OR11 55.95266 161.209 64.5 90 50 LE-1D/1 1357 CUBE 0774 2015-08-07 2016-07-06 SHZ SHN SHE
OR12 55.87659 161.1298 111.6 90 50 Trillium Compact C013 CUBE 0775 2015-08-06 2016-06-22 HHZ HHN HHE
OR13 55.78698 161.1008 1121.7 90 50 LE-1D/1 1823 CUBE 0776 2015-08-07 2016-07-06 SHZ SHN SHE
OR14 55.71738 161.0275 754.2 90 50 Trillium Compact C014 CUBE 0777 2015-08-07 2016-07-06 HHZ HHN HHE
OR15 55.65928 160.9273 657.5 90 50 LE-1D/1 1824 CUBE 0778 2015-08-07 2016-07-05 SHZ SHN SHE
OR16 55.59436 160.8192 997.2 90 50 Trillium Compact C015 CUBE 0782 2015-08-07 2016-06-14 HHZ HHN HHE
OR17 55.54394 160.6951 885.9 90 50 LE-1D/1 1826 CUBE 0810 2015-08-07 2016-04-18 SHZ SHN SHE
OR18 55.48529 160.5833 936.1 90 50 Trillium Compact C016 CUBE 0811 2015-08-07 2016-07-05 HHZ HHN HHE
OR19 55.45646 160.4475 771.1 90 50 LE-1D/1 1871 CUBE 0812 2015-08-07 2015-11-07 SHZ SHN SHE
OR2 56.1461 159.9799 69.3 90 50 LE-1D/1 1348 CUBE 0765 2015-08-04 2015-10-01 SHZ SHN SHE
OR20 55.44971 160.2577 155.8 90 50 Trillium Compact C017 CUBE 0813 2015-08-08 2016-07-17 HHZ HHN HHE
OR21 55.43907 160.0395 102.5 90 50 LE-1D/1 1855 CUBE 0815 2015-08-08 2016-04-24 SHZ SHN SHE
OR22 55.46861 159.8576 102.4 90 50 Trillium Compact C018 CUBE 0816 2015-08-08 2015-10-09 HHZ HHN HHE
OR23 55.56626 159.7808 61.1 90 50 LE-1D/1 1896 CUBE 0817 2015-08-06 2016-04-19 SHZ SHN SHE
OR24 55.67693 159.7874 62.4 90 50 LE-1D/1 1981 CUBE 0818 2015-08-08 2015-09-20 SHZ SHN SHE
OR25 55.7674 159.7291 47.9 90 50 Trillium Compact C019 CUBE 0819 2015-08-08 2015-12-27 HHZ HHN HHE
OR27 56.26281 160.2162 143.7 90 50 CMG-6T T6Q61 CUBE 0ADK 2015-08-05 2015-09-10 HHZ HHN HHE
OR28 56.32264 160.3639 90.4 90 50 CMG-6T T6Q74 CUBE 0ADJ 2015-08-05 2016-07-17 HHZ HHN HHE
OR29 56.34616 160.6061 29.0 90 50 CMG-6TD T6G58 CMG-6TD 6869 2015-08-17 2016-05-23 HHZ HHN HHE
OR3 56.22097 160.0801 77.9 90 50 Trillium Compact C008 CUBE 0766 2015-08-04 2016-06-16 HHZ HHN HHE
OR30 56.28103 160.9763 41.0 90 50 CMG-6TD T6B14 CMG-6TD 6861 2015-08-18 2016-04-28 HHZ HHN HHE
OR31 56.2155 161.0755 35.0 90 50 CMG-6TD T6G46 CMG-6TD 6875 2015-08-18 2015-08-30 HHZ HHN HHE
OR32 56.12659 161.1277 58.0 90 50 CMG-6TD T6B19 CMG-6TD 6868 2015-08-18 2016-07-07 HHZ HHN HHE
OR4 55.95408 159.2156 311.8 90 50 Trillium Compact C009 CUBE 0767 2015-08-11 2015-09-29 HHZ HHN HHE
OR5 56.03047 159.0531 281.5 90 50 LE-1D/1 1354 CUBE 0768 2015-08-10 2015-11-09 SHZ SHN SHE
OR6 56.02554 158.8437 396.6 90 50 Trillium Compact C010 CUBE 0769 2015-08-10 2016-07-17 HHZ HHN HHE
OR7 55.78424 159.3988 94.2 90 50 LE-1D/1 1166 CUBE 0770 2015-08-10 2016-07-15 SHZ SHN SHE
OR8 55.6734 159.4504 60.1 90 50 LE-1D/1 1355 CUBE 0771 2015-08-10 2016-02-08 SHZ SHN SHE
OR9 55.60096 159.6208 61.6 90 50 Trillium Compact C011 CUBE 0772 2015-08-10 2016-05-01 HHZ HHN HHE
SV1 55.63996 160.2447 694.6 90 50 LE-1D/1 1186 CUBE 0854 2015-08-03 2016-07-06 SHZ SHN SHE
SV12 55.54857 160.3577 257.3 90 50 LE-1D/1 1337 CUBE 0860 2015-08-06 2015-10-14 SHZ SHN SHE
SV13 56.09922 160.6315 2453.9 90 50 CMG-6T T6Q72 CUBE 0ADG 2015-08-08 2016-07-06 HHZ HHN HHE
SV2 55.75449 160.0419 207.3 90 50 Trillium Compact C050 CUBE 0855 2015-08-04 2015-09-21 HHZ HHN HHE
SV3 55.55764 160.0851 117.2 90 50 Trillium Compact C051 CUBE 0856 2015-08-08 2016-05-17 HHZ HHN HHE
SV4 55.88939 159.9505 174.3 90 50 LE-1D/1 1332 CUBE 0601 2015-08-04 2016-07-15 SHZ SHN SHE
SV5 56.01107 160.0373 235.3 90 50 Trillium Compact C052 CUBE 0603 2015-08-02 2015-09-08 HHZ HHN HHE
SV6 55.79492 160.3444 2105.4 90 50 LE-1D/1 1334 CUBE 0825 2015-08-08 2016-07-05 SHZ SHN SHE
SV7 55.79243 160.5344 1300.6 90 50 Trillium Compact C054 CUBE 0826 2015-08-08 2016-07-07 HHZ HHN HHE
SV8 55.89952 160.4906 1427.9 90 50 LE-1D/1 334a CUBE 0827 2015-08-08 2015-11-13 SHZ SHN SHE
SV9 55.99524 160.4304 1835.5 90 50 Trillium Compact C055 CUBE 0857 2015-08-07 2015-12-18 HHZ HHN HHE
Table 2 Locations of reference points for sensor orinentation. Please note the last column which indicates cases where the reference points are not located in the north-pointing direction (default) but in the direction that the deployed sensor indicated as south.
Label Ref Lat Ref Lon Ref Ele Location of ref
B01 56.005256 160.331637 1535.017  
B02 56.146097 160.332212 1346.875  
B03 56.206812 160.492630 1287.959  
B04 56.222923 160.687482 1133.844  
B05 56.115524 160.753091 1373.966  
B06 56.055136 160.766400 1542.63  
B07 55.985612 160.679112 1508.101 south
B08 55.933209 160.605780 1438.499  
B09 56.190458 160.678024 1266.205  
IR1 55.718206 160.304863 1163.385  
IR10 55.119897 159.953160 265.381  
IR11        
IR12        
IR13        
IR14        
IR15 55.688044 160.699798 771.288  
IR16 55.651297 160.502734 427.532 south
IR17 56.178473 160.407352 1311.256  
IR18 56.200050 160.593600 1353.08 south
IR19 56.174108 160.752815 1062.377  
IR2 55.785599 160.232393 1062.506  
IR20 56.100329 160.827657 935.049  
IR3 55.857529 160.225437 1111.721 south
IR4 55.957850 160.236245 985.36  
IR5 56.031230 160.244186 973.647  
IR6 56.111965 160.269102 1314.898  
IR7 55.347778 160.583785 1462.549  
IR8 55.231249 160.080119 506.262  
IR9 55.311622 159.864097 1089.672  
OL1 55.877994 159.357963 145.438  
OL2 55.888915 159.543573 62.373  
OL3 55.438798 159.677199 83.452  
OL4 55.549435 159.454161 147.426  
OL5 55.292021 159.565895 112.317  
OL6 55.301392 160.278550 1051.971  
OL7 56.156949 161.508697 891.982  
OL8        
OL9        
OR1 55.965136 159.804443 49.919 south
OR10 56.050928 161.213353 44.678  
OR11 55.952916 161.209056 60.906  
OR12 55.876351 161.129859 109.252  
OR13 55.786396 161.100933 1119.887  
OR14 55.717616 161.027518 755.295  
OR15        
OR16 55.594981 160.819311 996.67  
OR17 55.543740 160.695138 882.982 south
OR18 55.485047 160.583280 935.535 south
OR19 55.456038 160.447563 765.791 south
OR2 56.146316 159.980011 70.176  
OR20 55.449858 160.257716 155.443  
OR21 55.439206 160.039521 101.443  
OR22 55.468822 159.857553 102.602  
OR23 55.566506 159.780687 59.801  
OR24 55.677039 159.787401 61.128  
OR25 55.767544 159.729128 49.038  
OR26 55.861250 159.775498 64.444  
OR27 56.262674 160.216187 142.908  
OR28 56.322818 160.363902 88.111  
OR29        
OR3 56.221179 160.080074 75.527  
OR30        
OR31        
OR32        
OR4 55.954217 159.215638 308.103  
OR5 56.030655 159.053095 282.853  
OR6 56.025697 158.843609 396.165  
OR7 55.784446 159.398817 93.715  
OR8 55.673629 159.450295 56.789  
OR9 55.601158 159.620791 61.278  
SV1 55.640260 160.244564 686.86  
SV10 56.022206 160.725875 1777.906  
SV11 55.190398 159.767129 155.78  
SV12        
SV13 56.099382 160.631512 2450.758  
SV2 55.754591 160.041935 208.452  
SV3 55.557840 160.084959 117.4  
SV4 55.889103 159.950441 173.729  
SV5 56.011158 160.037244 234.825  
SV6 55.795164 160.344300 2103.548  
SV7 55.792115 160.534561 1305.958 south
SV8 55.899784 160.490660 1426.31  
SV9 55.995680 160.430187 1834.615  

Fig. 1 Station distribution in experiment (red symbols). If present, white-filled symbols show permanent stations and other temporary experiments archived at EIDA or IRIS-DMC, whose activity period overlapped at least partially with the time of the experiment. If present, open symbols show station sites which were no longer active at the time of the experiment, e.g. prior temporary experiments.

(H,S)HZ (H,S)HN (H,S)HE
_images/B01-SHZ.png _images/B01-SHN.png _images/B01-SHE.png
_images/B02-SHZ.png _images/B02-SHN.png _images/B02-SHE.png
_images/B04-SHZ.png _images/B04-SHN.png _images/B04-SHE.png
_images/B05-SHZ.png _images/B05-SHN.png _images/B05-SHE.png
_images/B07-SHZ.png _images/B07-SHN.png _images/B07-SHE.png
_images/B08-SHZ.png _images/B08-SHN.png _images/B08-SHE.png
_images/B09-SHZ.png _images/B09-SHN.png _images/B09-SHE.png
_images/IR1-HHZ.png _images/IR1-HHN.png _images/IR1-HHE.png
_images/IR10-HHZ.png _images/IR10-HHN.png _images/IR10-HHE.png
_images/IR11-SHZ.png _images/IR11-SHN.png _images/IR11-SHE.png
_images/IR12-HHZ.png _images/IR12-HHN.png _images/IR12-HHE.png
_images/IR13-SHZ.png _images/IR13-SHN.png _images/IR13-SHE.png
_images/IR14-HHZ.png _images/IR14-HHN.png _images/IR14-HHE.png
_images/IR15-SHZ.png _images/IR15-SHN.png _images/IR15-SHE.png
_images/IR16-HHZ.png _images/IR16-HHN.png _images/IR16-HHE.png
_images/IR17-HHZ.png _images/IR17-HHN.png _images/IR17-HHE.png
_images/IR18-HHZ.png _images/IR18-HHN.png _images/IR18-HHE.png
_images/IR19-HHZ.png _images/IR19-HHN.png _images/IR19-HHE.png
_images/IR20-HHZ.png _images/IR20-HHN.png _images/IR20-HHE.png
_images/IR3-HHZ.png _images/IR3-HHN.png _images/IR3-HHE.png
_images/IR4-SHZ.png _images/IR4-SHN.png _images/IR4-SHE.png
_images/IR6-SHZ.png _images/IR6-SHN.png _images/IR6-SHE.png
_images/IR7-HHZ.png _images/IR7-HHN.png _images/IR7-HHE.png
_images/IR8-SHZ.png _images/IR8-SHN.png _images/IR8-SHE.png
_images/IR9-HHZ.png _images/IR9-HHN.png _images/IR9-HHE.png
_images/OL1-SHZ.png _images/OL1-SHN.png _images/OL1-SHE.png
_images/OL2-HHZ.png _images/OL2-HHN.png _images/OL2-HHE.png
_images/OL3-SHZ.png _images/OL3-SHN.png _images/OL3-SHE.png
_images/OL4-SHZ.png _images/OL4-SHN.png _images/OL4-SHE.png
_images/OL5-HHZ.png _images/OL5-HHN.png _images/OL5-HHE.png
_images/OL6-HHZ.png _images/OL6-HHN.png _images/OL6-HHE.png
_images/OL7-HHZ.png _images/OL7-HHN.png _images/OL7-HHE.png
_images/OL8-HHZ.png _images/OL8-HHN.png _images/OL8-HHE.png
_images/OL9-HHZ.png _images/OL9-HHN.png _images/OL9-HHE.png
_images/OR1-HHZ.png _images/OR1-HHN.png _images/OR1-HHE.png
_images/OR10-HHZ.png _images/OR10-HHN.png _images/OR10-HHE.png
_images/OR11-SHZ.png _images/OR11-SHN.png _images/OR11-SHE.png
_images/OR12-HHZ.png _images/OR12-HHN.png _images/OR12-HHE.png
_images/OR13-SHZ.png _images/OR13-SHN.png _images/OR13-SHE.png
_images/OR14-HHZ.png _images/OR14-HHN.png _images/OR14-HHE.png
_images/OR15-SHZ.png _images/OR15-SHN.png _images/OR15-SHE.png
_images/OR16-HHZ.png _images/OR16-HHN.png _images/OR16-HHE.png
_images/OR17-SHZ.png _images/OR17-SHN.png _images/OR17-SHE.png
_images/OR18-HHZ.png _images/OR18-HHN.png _images/OR18-HHE.png
_images/OR19-SHZ.png _images/OR19-SHN.png _images/OR19-SHE.png
_images/OR2-SHZ.png _images/OR2-SHN.png _images/OR2-SHE.png
_images/OR20-HHZ.png _images/OR20-HHN.png _images/OR20-HHE.png
_images/OR21-SHZ.png _images/OR21-SHN.png _images/OR21-SHE.png
_images/OR22-HHZ.png _images/OR22-HHN.png _images/OR22-HHE.png
_images/OR23-SHZ.png _images/OR23-SHN.png _images/OR23-SHE.png
_images/OR24-SHZ.png _images/OR24-SHN.png _images/OR24-SHE.png
_images/OR25-HHZ.png _images/OR25-HHN.png _images/OR25-HHE.png
_images/OR27-HHZ.png _images/OR27-HHN.png _images/OR27-HHE.png
_images/OR28-HHZ.png _images/OR28-HHN.png _images/OR28-HHE.png
_images/OR29-HHZ.png _images/OR29-HHN.png _images/OR29-HHE.png
_images/OR3-HHZ.png _images/OR3-HHN.png _images/OR3-HHE.png
_images/OR30-HHZ.png _images/OR30-HHN.png _images/OR30-HHE.png
_images/OR31-HHZ.png _images/OR31-HHN.png _images/OR31-HHE.png
_images/OR32-HHZ.png _images/OR32-HHN.png _images/OR32-HHE.png
_images/OR4-HHZ.png _images/OR4-HHN.png _images/OR4-HHE.png
_images/OR5-SHZ.png _images/OR5-SHN.png _images/OR5-SHE.png
_images/OR6-HHZ.png _images/OR6-HHN.png _images/OR6-HHE.png
_images/OR7-SHZ.png _images/OR7-SHN.png _images/OR7-SHE.png
_images/OR8-SHZ.png _images/OR8-SHN.png _images/OR8-SHE.png
_images/OR9-HHZ.png _images/OR9-HHN.png _images/OR9-HHE.png
_images/SV1-SHZ.png _images/SV1-SHN.png _images/SV1-SHE.png
_images/SV12-SHZ.png _images/SV12-SHN.png _images/SV12-SHE.png
_images/SV13-HHZ.png _images/SV13-HHN.png _images/SV13-HHE.png
_images/SV2-HHZ.png _images/SV2-HHN.png _images/SV2-HHE.png
_images/SV3-HHZ.png _images/SV3-HHN.png _images/SV3-HHE.png
_images/SV4-SHZ.png _images/SV4-SHN.png _images/SV4-SHE.png
_images/SV5-HHZ.png _images/SV5-HHN.png _images/SV5-HHE.png
_images/SV6-SHZ.png _images/SV6-SHN.png _images/SV6-SHE.png
_images/SV7-HHZ.png _images/SV7-HHN.png _images/SV7-HHE.png
_images/SV8-SHZ.png _images/SV8-SHN.png _images/SV8-SHE.png
_images/SV9-HHZ.png _images/SV9-HHN.png _images/SV9-HHE.png

Fig. 2 Noise probability density functions for all stations for database holdings.

_images/st1.png _images/st2.png
_images/st3.png _images/st4.png

Fig. 3 Overview of uptimes of all stations generated with `obspy-scan`.

_images/X9.IR1.X.X_2015-07-29T000000.000000Z_GPS.png _images/X9.IR2.X.X_2015-07-28T230000.000000Z_GPS.png
_images/X9.IR3.X.X_2015-08-07T230000.000000Z_GPS.png _images/X9.IR4.X.X_2015-08-08T000000.000000Z_GPS.png
_images/X9.IR6.X.X_2015-08-07T220000.000000Z_GPS.png _images/X9.IR7.X.X_2015-08-08T060000.000000Z_GPS.png
_images/X9.IR8.X.X_2015-08-08T070000.000000Z_GPS.png _images/X9.IR9.X.X_2015-08-08T080000.000000Z_GPS.png
_images/X9.IR10.X.X_2015-08-07T080000.000000Z_GPS.png _images/X9.IR11.X.X_2015-08-07T000000.000000Z_GPS.png
_images/X9.IR12.X.X_2015-08-07T010000.000000Z_GPS.png _images/X9.IR13.X.X_2015-08-07T020000.000000Z_GPS.png
_images/X9.IR14.X.X_2015-08-07T030000.000000Z_GPS.png _images/X9.IR15.X.X_2015-08-06T070000.000000Z_GPS.png
_images/X9.IR16.X.X_2015-08-06T080000.000000Z_GPS.png _images/X9.OL1.X.X_2015-08-10T040000.000000Z_GPS.png
_images/X9.OL2.X.X_2015-08-09T220000.000000Z_GPS.png _images/X9.OL3.X.X_2015-08-07T000000.000000Z_GPS.png
_images/X9.OL4.X.X_2015-08-10T010000.000000Z_GPS.png _images/X9.OL5.X.X_2015-08-07T030000.000000Z_GPS.png
_images/X9.OL6.X.X_2015-08-07T080000.000000Z_GPS.png _images/X9.OR1.X.X_2015-08-04T060000.000000Z_GPS.png
_images/X9.OR2.X.X_2015-08-04T220000.000000Z_GPS.png _images/X9.OR3.X.X_2015-08-04T230000.000000Z_GPS.png
_images/X9.OR4.X.X_2015-08-11T000000.000000Z_GPS.png _images/X9.OR5.X.X_2015-08-10T230000.000000Z_GPS.png
_images/X9.OR6.X.X_2015-08-10T210000.000000Z_GPS.png _images/X9.OR7.X.X_2015-08-10T040000.000000Z_GPS.png
_images/X9.OR8.X.X_2015-08-10T020000.000000Z_GPS.png _images/X9.OR9.X.X_2015-08-10T000000.000000Z_GPS.png
_images/X9.OR10.X.X_2015-08-06T230000.000000Z_GPS.png _images/X9.OR11.X.X_2015-08-07T000000.000000Z_GPS.png
_images/X9.OR12.X.X_2015-08-06T190000.000000Z_GPS.png _images/X9.OR13.X.X_2015-08-07T010000.000000Z_GPS.png
_images/X9.OR14.X.X_2015-08-07T020000.000000Z_GPS.png _images/X9.OR15.X.X_2015-08-07T060000.000000Z_GPS.png
_images/X9.OR16.X.X_2015-08-07T060000.000000Z_GPS.png _images/X9.OR17.X.X_2015-08-07T070000.000000Z_GPS.png
_images/X9.OR18.X.X_2015-08-07T070000.000000Z_GPS.png _images/X9.OR19.X.X_2015-08-07T080000.000000Z_GPS.png
_images/X9.OR20.X.X_2015-08-08T060000.000000Z_GPS.png _images/X9.OR21.X.X_2015-08-08T040000.000000Z_GPS.png
_images/X9.OR22.X.X_2015-08-08T020000.000000Z_GPS.png _images/X9.OR23.X.X_2015-08-06T210000.000000Z_GPS.png
_images/X9.OR24.X.X_2015-08-08T020000.000000Z_GPS.png _images/X9.OR25.X.X_2015-08-08T000000.000000Z_GPS.png
_images/X9.SV1.X.X_2015-08-03T020000.000000Z_GPS.png _images/X9.SV2.X.X_2015-08-04T010000.000000Z_GPS.png
_images/X9.SV3.X.X_2015-08-08T040000.000000Z_GPS.png _images/X9.SV4.X.X_2015-08-04T040000.000000Z_GPS.png
_images/X9.SV5.X.X_2015-08-02T020000.000000Z_GPS.png _images/X9.SV6.X.X_2015-08-08T180000.000000Z_GPS.png
_images/X9.SV7.X.X_2015-08-08T200000.000000Z_GPS.png _images/X9.SV8.X.X_2015-08-08T220000.000000Z_GPS.png
_images/X9.SV9.X.X_2015-08-07T210000.000000Z_GPS.png _images/X9.SV12.X.X_2015-08-06T080000.000000Z_GPS.png

Fig. 4 Number of daily GPS logs for all Cube digitizers.