Seismica

Our special issue on the Cascadia Subduction Zone is open and welcoming your research and contributions to this fascinating area. Check out the topics, the editors, and more information on this special issue: https://lnkd.in/eTDwKyaS #cascadia #seismology #earthquakescience #earthquake #pacificnorthwest #openaccess #DiamondOpenAccess #openaccessjournal #openscience  

Bolton et al. show that static stresses induced from a nearby ML 4.0 foreshock significantly perturbed the local stress state and could have triggered the 2020 Mentone Mw 4.8 earthquake in West Texas. https://lnkd.in/er32iBPH Understanding how earthquakes get started is a fundamental goal of earthquake science. If the early stages of an earthquake can be measured and characterized, then these details could in principle be integrated into models to help advance earthquake early warning systems and earthquake forecasting. Here, Bolton studies a sequence of 11 earthquakes leading up to the 2020 Mentone Mw 4.8 mainshock. Seismicity in this area is in large part induced from oil-gas operations, such as wastewater disposal and hydraulic fracturing. The sequence started with a ML 4.0 earthquake and was followed by a series of 10 smaller ML 1-2 earthquakes. The author shows that the initial ML 4.0 earthquake increased the stress state along the fault enough that it could have triggered several of the smaller ML 1-2 earthquakes as well as the mainshock itself.  At least 6/11 of earthquakes that followed the initial ML 4.0 are aftershocks as opposed to foreshocks to the mainshock. This work demonstrates that the nucleation process of the Mw 4.8 mainshock cannot easily be explained by simple end-member models. Instead, it is likely that a combination of mechanisms contributed to the nucleation and triggering of the 2020 Mw 4.8 Mentone mainshock. #Texas #mentone  #Seismology #EarthquakeScience #peerreviewed #DiamondOpenAccess #Earthquake #OpenAccess #OpenScience

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What are reliable earthquake magnitudes?   Dahm et al.'s method uses synthetic seismogram peak-values to calculate moment magnitudes of microearthquakes—essential for studying shallow, human-induced seismicity: https://lnkd.in/etShMK6R Moment magnitudes, an accurate measure of earthquake size, are estimated from low-frequency source spectra or by inversion of full seismograms, both of which can be challenging for small or noisy events. Traditional local magnitude scales, introduced more than 100 years ago, are calculated from high-frequency peak amplitudes and are easier to obtain for small events. However, local magnitude scales are limited by fault complexity, wave behavior, or recording equipment. Dahm et al.'s new method combines real earthquake data with peak amplitudes from synthetic seismograms, allowing them to calculate moment magnitudes even for small events and few observations. This approach takes into account factors such as velocity models and provides reliable uncertainty estimates. It is particularly useful for studying human-induced seismicity at shallow depths and in areas of low natural activity, where empirical scaling between moment and local magnitude scales is not possible. #Seismology #EarthquakeScience #peerreviewed #DiamondOpenAccess #Earthquake #OpenAccess #OpenScience

Our dedicated volunteer production team will take a well-deserved holiday break from Dec 20, 2024, to Jan 6, 2025. Our website remains open. Submissions received during this time will be processed for initial checks and assigned handling editors after the break. Happy Holidays!

Finite-fault rupture models, without the finite-fault? Thurin demonstrates it is possible to simplify the classical representation for large earthquakes using moment tensor interpolation. https://lnkd.in/e9vdT463 The two typical methods to represent large earthquake rupture models are:  1) the finite-fault model, which paints a very detailed picture of the spatio-temporal aspect of the rupture but is expensive to produce, and 2) the multiple point-sources model, which is a simpler representation but might lack the details of finite-faults. In this work, Thurin shows how to combine the two methods and bridge the gap using interpolation methods borrowed from the field of computer-generated graphics and animation and ideas from tensor-field reconstructions.  Thurin also shows how this representation helps with inversion by comparing an interpolated field of moment tensor with the USGS NEIC finite-fault product for the 2024 Noto Earthquake, Japan. #moment-tensor #finitefault  #Seismology #EarthquakeScience #peerreviewed #DiamondOpenAccess #Earthquake #OpenAccess #OpenScience

We know you love data, discoveries, coffee, free food — and yes, deadline extensions! While we can’t offer you coffee or food, we’ve extended the deadline for the Cascadia Subduction Zone special issue to March 31, 2025. Details here: https://lnkd.in/eTDwKyaS

Hey geoscientists, big news: Advances in Geochemistry and Cosmochemistry will start accepting submissions on January 20, 2025. Start preparing your submissions here: https://lnkd.in/eZw7Az7i. Check out their page, stay tuned, and get ready to share your research!

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Schultz et al. find that earthquakes up to magnitude 4 have been induced by hydraulic fracturing operations in the Neuquén Basin, Argentina. Learn more here:  https://lnkd.in/ebNej2yu In this study, Schultz et al. performed statistical tests to definitively link earthquake clusters with hydraulic fracturing operations in time and space.  They conclude that earthquakes as large as M4 are most likely induced, based on both this association and a comparison with induced earthquakes elsewhere. #Argentina  #Seismology #EarthquakeScience #peerreviewed #DiamondOpenAccess #Earthquake #inducedearthquakes #OpenAccess #OpenScience