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    GSA 2021 session: T11. Recent to Long-Term Slip Histories of Active Faults and Folds in Cascadia

    2021-06-07 | Christoph Grützner in Meeting | one response

    This is an interesting topical session at the GSA 2021 meeting:

    ‘T11. Recent to Long-Term Slip Histories of Active Faults and Folds in Cascadia’  

    at the 2021 Annual Meeting of the Geological Society of America. We hope to attract a diverse array of talks that explore the faults and folds in the upper plate of the Cascadia subduction zone that are both active and have protracted histories of fault slip. We welcome submissions summarizing recent tectonic geomorphologic, paleoseismologic, geodetic, seismic reflection, and other data that characterize deformation of Quaternary-active structures and seek contributions from geologic, geophysical, and related research that examines the longer-term history of active faults. We particularly invite studies in the forearc, arc, and backarc of Cascadia that bridge the gap between Quaternary evidence of fault activity with longer records of fault slip that may address the consistency of slip rates over time and the timing of fault/fold initiation. 

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  • Christoph GrütznerCC BY-SA 3.0

    New papers on paleoseismology, earthquakes, and active tectonics (June 2021)

     | Christoph Grützner in Paper | one response

    Better late than never – here are the latest papers! Enjoy reading and let me know if I have missed anything.

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  • Christoph GrütznerCC BY-SA 3.0

    New papers on paleoseismology, earthquakes, and active tectonics (May 2021)

    2021-05-03 | Christoph Grützner in Paper

    Here we go with a brand new list of papers that deal with past and recent large earthquakes, with tsunamis, and with active tectonics studies. A huge fraction of studies is on (Central) Asia this time. Enjoy reading & stay safe!

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  • Christoph GrütznerCC BY-SA 3.0

    New papers on paleoseismology, earthquakes, and active tectonics (Apr 2021)

    2021-04-01 | Christoph Grützner in Paper

    Just as last month we have a veeeery long list today. Quite a number of papers deal with new data from Central Asia and S America, but of course there’s also something on the menu for connoisseurs of archaeoseismology, European, N American & African tectonics, and physics-based fault studies. Enjoy reading, stay safe and let me know if I’ve overlooked something.

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  • INQUA project EDITH – Kickoff meeting on 14-16 April 2021

    2021-03-26 | Christoph Grützner in Uncategorized

    Project EDITH runs under the umbrella of INQUA’s TERPRO commission and the Int’l Focus Group TPPT (Terrestrial Processes Perturbed by Tectonics). EDITH proposes to organize and facilitate annual meetings with a wide range of experts in earthquake geology, paleoseismology, geodesy and tectonic geomorphology to gain a better understanding of the earthquake cycle with the final aim to provide constraints for future new seismic hazard assessment (SHA) geologically-based models. The kickoff meeting has now been scheduled to 14-16 April, 2021 and will be held via Zoom.

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  • Call for papers: Special Issue on the 2021 Northern Thessaly, Greece, earthquake sequence

    2021-03-22 | Christoph Grützner in Earthquake, Paper

    The Bulletin of the Geological Society of Greece (BGSG) is inviting papers for a Special Issue on the 2021 Northern Thessaly, Greece, Earthquake Sequence. This sequence included a M6.3 mainshock on March 3, followed 32 hours later by a M6.0 event and a M5.6 event on March 12, and thousands of smaller aftershocks. This was the most significant earthquake sequence in northern Thessaly in 80 years, and the first large events in this area of Greece since the major upgrades of the seismological, strong motion and geodetic networks. Remote-sensing imagery is available from a number of satellites and other platforms. The sequence raises numerous questions related to fault interactions, blind faulting, near- and far-field ground motions, damage distribution, earthquake triggering, liquefaction phenomena and seismic hazard and seismotectonics of the Northern Thessaly.

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  • Presentation on the March 2021 earthquakes in Thessaly, Greece by A. Ganas et al.

    2021-03-20 | Christoph Grützner in Earthquake

    The March, 2021 earthquake series in Greece ruptured a previously unmapped fault and caused severe damage in the epicentral area. The largest shock had a magnitude of M6.3. In this presentation, Athanassios Ganas and colleagues summarize their first observations from space geodesy and field evidence of earthquake environmental effects.

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  • Report on the 3 & 4 March, 2021, northern Thessaly (Greece) earthquakes

    2021-03-15 | Christoph Grützner in Earthquake | one response

    On 3 March, 2021, an earthquake of magnitude MW6.3 hit northern Thessaly in Greece. According to the USGS, the hypocentre was at 11.5 km depth. Normal faulting occurred either on a plane dipping 55° to the SW or on a plane dipping 36° to the NE. The quake caused a lot of damage in the village of Tyrnavos (Τύρναβος) and the surrounding areas. Widespread liquefaction was also observed. On 4 March, 2021, a mb5.8 aftershock occurred. Our colleagues S. Pavlides, A. Chatzipetros, S. Sboras, E. Kremastas and A. Chatziioannou have prepared a first field report in which they document the environmental effects of the quake.

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  • Intraplate Active Tectonics and Seismicity in Central/Western Europe – a workshop: 23 March, 2021

     | Christoph Grützner in Meeting

    The 2021 meeting on “Intraplate Active Tectonics and Seismicity in Central/Western Europe“ will take place on 23 March, 2021. These meetings were held before traditionally in several countries, this year it will be held  via Zoom. The meeting used to be organised in the Euregio area, Aachen/NRW, Belgium and the Netherlands, but is now opened up to include more regions, as there is a joint topic that connects many places: intraplate tectonics.

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  • Link tectonic processes to the seismic cycle: A 2-Myr-long seismite record from NE Tibet

    2021-03-10 | Yin Lu in Paper

    A recent study investigated disturbances that preserved in the upper 260 m of a 723-m deep core drilled on the crest of a thrust-cored anticline in the western Qaidam Basin, NE Tibet.

    1. Key Points:
    • We interpret micro-faults, soft-sediment deformation, slumps, and detachment surfaces as paleoearthquake/tectonic indicators
    • The core records five seismite clusters between 3.6 and 2.7 Ma, revealing episodic thrusting in relation to intense regional deformation
    • During the clusters, regional deformation was concentrated more in the fold-and-thrust system than along regional major strike-slip faults

    more

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Pa·le·o·seis·mic·i·ty [ pālē·ə·sīz·mĭs′ĭ·tē ] noun, plural -ties. Ancient earthquake activity.

Paleoseismicity.org is a page dedicated to scientists and everyone else interested in paleoseismology, archeoseismology, neotectonics, earthquake archeology, earthquake engineering and related topics. Different authors irregularly write about recent papers, field work, problems, conferences or just interesting things that they come across. We intend to provide a platform for discussion and scientific exchange. Interested in joining as an author? Please contact us!



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