ISOLA Code for Multiple-Point Source Modeling—Review

Zahradnı́k, Jiřı́; Sokos, Efthimios

doi:10.1007/978-3-319-77359-9_1

Cited by 33 publications

(19 citation statements)

References 50 publications

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“…We calculated focal mechanisms through moment tensor inversion for the five strongest events (magnitudes between 4.5 and 5.3) using ISOLA software (Sokos and Zahradnik, 2008;Zahradník and Sokos, 2018) and the velocity model of Rigo et al (1996). We used stations from both CRLnet and the Hellenic Unified Seismological Network, at a maximum epicentral distance of 60 km.…”

Section: Seismological Methodsmentioning

confidence: 99%

The Western Gulf of Corinth (Greece) 2020–2021 Seismic Crisis and Cascading Events: First Results from the Corinth Rift Laboratory Network

et al. 2021

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We investigate a seismic crisis that occurred in the western Gulf of Corinth (Greece) between December 2020 and February 2021. This area is the main focus of the Corinth Rift Laboratory (CRL) network, and has been closely monitored with local seismological and geodetic networks for 20 yr. The 2020–2021 seismic crisis evolved in three stages: It started with an Mw 4.6 event near the northern shore of the Gulf, opposite of Aigion, then migrated eastward toward Trizonia Island after an Mw 5.0 event, and eventually culminated with an Mw 5.3 event, ∼3 km northeast of the Psathopyrgos fault. Aftershocks gradually migrated westward, triggering another cluster near the junction with the Rion–Patras fault. Moment tensor inversion revealed mainly normal faulting; however, some strike-slip mechanisms also exist, composing a complex tectonic regime in this region dominated by east–west normal faults. We employ seismic and geodetic observations to constrain the geometry and kinematics of the structures that hosted the major events. We discuss possible triggering mechanisms of the second and third stages of the sequence, including fluids migration and aseismic creep, and propose potential implications of the Mw 5.3 mainshock for the seismic hazard of the region.

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Section: Seismological Methodsmentioning

confidence: 99%

The Western Gulf of Corinth (Greece) 2020–2021 Seismic Crisis and Cascading Events: First Results from the Corinth Rift Laboratory Network

et al. 2021

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“…To better constrain and verify the initial focal mechanism solutions we also worked with ISOLA , which allowed us to estimate the moment tensor of two of the largest events (i.e., the M L > 4.0 occurring on 4 July 2018 at 1:50 and 19:45) (Sokos & Zahradnik, 2008, 2013; Zahradník & Sokos, 2018). We applied waveform inversion using both short‐period stations of the temporary network and the broadband stations from the INSN.…”

Section: Methodsmentioning

confidence: 99%

Tectonics of the Dead Sea Fault Driving the July 2018 Seismic Swarm in the Sea of Galilee (Lake Kinneret), Israel

et al. 2020

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Northern Israel was struck during July 2018 by a M L 4.4 earthquake followed by a seismic sequence that lasted about 30 days. This seismic sequence occurred in the center of a temporary seismic network deployed around the Sea of Galilee (Lake Kinneret). The network was installed to investigate the regional kinematics of the Dead Sea Fault, which is a major transform fault running N-S for more than 1,000 km. The data allowed us to develop a local velocity model for the Sea of Galilee. We relocated more than 600 earthquakes and calculated 27 focal mechanisms pointing out a complex kinematic setting, possibly controlled by fluids at depth. The seismic sequence developed along a NNW-striking direction and it is bounded to the east by the N-striking Dead Sea fault. Hypocenter depths range between 6 and 13 km. Directions of the principal stress tensors suggest a transtentional deformation, in agreement with the overall kinematics of the region. We analyze and discuss our data set to investigate mechanisms that potentially triggered the observed seismic swarm, including exacerbated ground water pumping proposed by previous authors. We suggest that the seismic sequence is driven by the dissipation of the elastic load that accumulated in this region.

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“…We solved for the best point source moment tensor by minimizing misfits between observed and synthetic waveforms using an iterative deconvolution inversion (Kikuchi & Kanamori, 1991) implemented in the ISOLA software package (Sokos & Zahradník, 2008). The 15 robust solutions (listed in supporting information Table S3) each meet the variance reduction and other quality criteria defined by Zahradník and Sokos (2018); one is shown as an example in supporting information Figure S8.…”

Section: Seismologymentioning

confidence: 99%

The 2020 M_w 6.8 Elazığ (Turkey) Earthquake Reveals Rupture Behavior of the East Anatolian Fault

Pousse‐Beltran

Nissen

Bergman

et al. 2020

Geophysical Research Letters

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The 2020 Mw 6.8 Elazığ earthquake was the largest along the East Anatolian Fault (EAF) in over a century, providing valuable insights into its rupture behavior. We use satellite geodesy and seismology to detail the mainshock rupture, postseismic deformation, and aftershocks. The mainshock propagated mostly westward at ∼2 km/s from a nucleation point on an abrupt ∼10° fault bend. Only one end of the rupture corresponds to an established EAF segment boundary, and the earthquake may have propagated into the slip zone of the 1874 M ∼ 7.1 Gölcuk Gölu earthquake. It exhibits a pronounced (∼80%) shallow slip deficit, only a small proportion of which is recovered by early aseismic afterslip. The slow rupture velocity, shallow slip deficit, and minimal afterslip are characteristic of earthquakes hosted by faults of low‐to‐intermediate structural maturity, indicating that faults continue to evolve in important ways even as they accrue cumulative offsets of tens of kilometers.

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ISOLA Code for Multiple-Point Source Modeling—Review

Cited by 33 publications

References 50 publications

The Western Gulf of Corinth (Greece) 2020–2021 Seismic Crisis and Cascading Events: First Results from the Corinth Rift Laboratory Network

The Western Gulf of Corinth (Greece) 2020–2021 Seismic Crisis and Cascading Events: First Results from the Corinth Rift Laboratory Network

Tectonics of the Dead Sea Fault Driving the July 2018 Seismic Swarm in the Sea of Galilee (Lake Kinneret), Israel

The 2020 M_w 6.8 Elazığ (Turkey) Earthquake Reveals Rupture Behavior of the East Anatolian Fault

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ISOLA Code for Multiple-Point Source Modeling—Review

Cited by 33 publications

References 50 publications

The Western Gulf of Corinth (Greece) 2020–2021 Seismic Crisis and Cascading Events: First Results from the Corinth Rift Laboratory Network

The Western Gulf of Corinth (Greece) 2020–2021 Seismic Crisis and Cascading Events: First Results from the Corinth Rift Laboratory Network

Tectonics of the Dead Sea Fault Driving the July 2018 Seismic Swarm in the Sea of Galilee (Lake Kinneret), Israel

The 2020 Mw 6.8 Elazığ (Turkey) Earthquake Reveals Rupture Behavior of the East Anatolian Fault

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The 2020 M_w 6.8 Elazığ (Turkey) Earthquake Reveals Rupture Behavior of the East Anatolian Fault