Dublin Institute for Advanced Studies (DIAS), Icelandic Met Office
Möllhoff, Martin; Bean, Christopher J.; Vogfjörd, Kristin S.
HERSK - Hekla Real-Time Seismic Network
Hekla is one of the most active and dangerous volcanoes in Iceland presenting a high hazard to air travel and a growing tourist population. It is hence important to monitor its seismic activity in real-time. However, until now the pre-eruption warning time is only around one hour. A temporary seismic network deployed by us around Hekla summit in 2012 recorded unexpected background micro-seismicity (Eibl et al., 2014). Seismic monitoring directly on the edifice could provide a possible means to early-warning if micro-seismicity on Hekla increases prior to an eruption. In addition, the monitoring of a fissure eruption close up is expected to better understand how it initiates in detail. This prompted the installation of the Hekla Real-Time Seismic Network (HERSK) in 2018 (Möllhoff et al., 2018a/b). We experienced logistical difficulties especially in winter months, mainly in relation to power provision. In this project we build on the first phase of HERSK to (1) test novel ways of powering stations that transmit real-time data in very harsh environments and (2) to work towards a real-time event detection and location system dedicated to seismic activity at Hekla volcano. The development of the real-time system necessitates the derivation of a velocity model which we derive by inverting observed microseismicty data. This opens the way to image the internal structure of Hekla volcano. This research is part of project EUROVOLC that has received funding from the European Union’s Horizon 2020 research and innovation actions under grant agreement No 731070. Waveform data are available from the GEOFON data centre, under network code XE and embargoed until Jan 2025.
* Description is taken from seismic metadata, and may not match the preferred title for citations.
Möllhoff, M.; B.H. Bergsson; H. Buxel; V. Kjartansson; B. Bergsson; C.J.Bean; K.S. Vogfjörd (2018b). The logistical challenge of establishing a real-time seismic network on Hekla volcano, Iceland. 36th General Assembly of the European Seismological Commission, Malta, ESC-S11-402.
Möllhoff, M.; C.J.Bean; K.S. Vogfjörd; B.H. Bergsson; H. Buxel; V. Kjartansson; B. Bergsson (2018a). HERSK, the first real-time seismic network on Hekla volcano in Iceland. Geoscience 2018 - Meeting the Challenges, 6Th November 2018, Dublin Castle. doi:10.13140/RG.2.2.27536.25600
Möllhoff, M.; M. Rezaeifar ; C.J. Bean; K.S. Vogfjörd: B.H. Bergsson; H. Buxel (2020). Recent microseismicity observed at Hekla volcano and first velocity inversion results. EGU General Assembly 2020, Online, 4-8 May 2020, EGU2020-18954. doi:10.5194/egusphere-egu2020-18954