Grond - A probabilistic earthquake source inversion framework

Heimann, Sebastian; Isken, Marius; Kühn, Daniela; Sudhaus, Henriette; Steinberg, Andreas; Daout, Simon; Cesca, Simone; Bathke, H.; Dahm, Torsten

doi:10.5880/gfz.2.1.2018.003

Cited by 51 publications

(45 citation statements)

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“…The NonLinLoc software used for hypocenter relocation is available at http://alomax.free.fr/nlloc/. The Grond software (Heimann et al, 2018) used for W-phase CMT inversion is available at https://pyrocko.org/grond/ docs/current/. The ISOLA software used for R-CMT inversion is available at http://seismo.geology.upatras.gr/ isola/.…”

Section: Discussionmentioning

confidence: 99%

Illuminating a Contorted Slab With a Complex Intraslab Rupture Evolution During the 2021 Mw 7.3 East Cape, New Zealand Earthquake

Okuwaki

Hicks

Craig

et al. 2021

Geophysical Research Letters

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Section: Discussionmentioning

confidence: 99%

Illuminating a Contorted Slab With a Complex Intraslab Rupture Evolution During the 2021 Mw 7.3 East Cape, New Zealand Earthquake

Okuwaki

Hicks

Craig

et al. 2021

Geophysical Research Letters

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“…We computed full Moment Tensor solutions (MTs) for the largest events with magnitudes above Mw 2.7 using the probabilistic full waveform inversion tool Grond (Heimann et al, 2018;Kühn et al, 2020). As input data, we combine the vertical component records of close-by OBS stations with vertical and transversal component records of land stations (distance <50 km).…”

Section: Inversion Of Moment Tensorsmentioning

confidence: 99%

Heralds of a Future Eruption? Swarms of Microseismicity beneath the submarine Kolumbo Volcano indicate Opening of near-vertical Fractures exploited by ascending Melts

Schmid¹,

Petersen²,

Hooft³

et al. 2022

Preprint

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The Kolumbo submarine volcano in the southern Aegean (Greece) is associated with repeated seismic unrest since at least two decades and the causes of this unrest are still hardly understood. We present a ten-month long microseismicity dataset for the period 2006-2007. The majority of earthquakes clusters in a cone-shaped portion of the crust below Kolumbo. The tip of this cone coincides with a low Vp-anomaly at 2-4 km depth, that is interpreted as a crustal melt reservoir. Our dataset includes several earthquake swarms, of which we analyse the four strongest in detail. The swarms occupy near-vertical volumes of the crust and together they form a zone of fracturing elongated in SW-NE direction, parallel to major regional faults. All four swarms show a general upward migration of hypocentres and the cracking front propagates unusually fast, compared to swarms in other volcanic areas. We conclude that the swarm seismicity is most likely triggered by a combination of pore-pressure perturbations and the re-distribution of elastic stresses. Fluid pressure perturbations are induced either by obstructions in the melt conduits in a rheologically strong layer between 6-9 km depth or by dynamic triggering from purely tectonic earthquakes. We conclude that the zone of fractures below Kolumbo is exploited by melts ascending from the mantle and filling the crustal melt reservoir. Together with the recurring seismic unrest, our study suggests that a future eruption is feasible and monitoring of the Kolumbo volcanic system is highly advisable.

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“…1). A single force inversion, using a probabilistic inversion framework ( 22 , 23 ) and fitting the full seismic waveforms at 12 stations within 85 km, resolved the source geometry in detail (Fig. 1, figs.…”

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Detection and potential early warning of catastrophic flow events with regional seismic networks

Cook

Rekapalli

Dietze

et al. 2021

Science

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Far away landslide detection A mass wasting and flood event on 7 February 2021 in Uttarakhand, India, killed more than 200 people and damaged two hydropower plants. Cook et al . discovered that teleseimic signals from the beginning of this event were recorded at different stations on a regional seismic network in northern India. The signals were observed up to 100 kilometers from the disaster and demonstrate the potential for these far-away monitoring stations to be useful for early warning. This discovery suggests a different way to monitor such remote Himalayan valleys for mass wasting hazards. —BG

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Grond - A probabilistic earthquake source inversion framework

Cited by 51 publications

References 0 publications

Illuminating a Contorted Slab With a Complex Intraslab Rupture Evolution During the 2021 Mw 7.3 East Cape, New Zealand Earthquake

Illuminating a Contorted Slab With a Complex Intraslab Rupture Evolution During the 2021 Mw 7.3 East Cape, New Zealand Earthquake

Heralds of a Future Eruption? Swarms of Microseismicity beneath the submarine Kolumbo Volcano indicate Opening of near-vertical Fractures exploited by ascending Melts

Detection and potential early warning of catastrophic flow events with regional seismic networks

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