• Fault ruptures of 18 normal and strike-slip earthquakes

    While working on my project on distributed faulting, I dig into the literature looking for additional case studies beside those contained in the SURE (SUrface Ruptures due to Earthquakes) database.

    I retrieved information on 18 normal and strike-slip events occurred between 1905 and 2011, with a magnitude range of Mw 5.9 – 8.3. I digitized rupture traces from published maps at a variable scale, dependent on the resolution of the original map. Earthquakes are from Iran (7 events), Mongolia, China, Turkey, Greece (2 events for each country), Italy, Kenya and Japan (1 event).

    Figure 1: The analyzed events
    Figure 2: Example for the 1970 Gediz (Turkey) event. Rupture traces after Ambraseys & Tchalenko (1972).

    The dataset is freely available on Zenodo at this link. The shapefile contains exclusively the ruptured segments, digitized from published maps – no data on amount of displacement are included.

    The dataset may enlarge the number of case histories of the worldwide and unified fault displacement database (SURE database) and hopefully will be useful for the development of the next generation of scaling relations.

  • PATA Days in Chile 2020: registration & short abstracts due 28 February!

    Dear colleagues,

    Please make sure to register for the 2020 PATA Days in Chile before 28 February here: https://www.patadayschile.cl

    You can also book your hotels here and submit the short abstracts. There’s only a limited number of places due to the remote venue in a wonderful resort hotel – first come, first served. The PATA Days (Paleoseismology, Active Tectonics, Archaeoseismology) is the largest int’l meeting for the paleoseismology community and supported by INQUA. In Chile, a lot of tsunami science will of course also happen.

  • Christoph GrütznerCC BY-SA 3.0

    New papers on paleoseismology, earthquakes, and active tectonics (Feb 2020)

    This is the first paper round-up of the year and I think it’s perhaps a new record. So many studies have been published, but maybe it’s just because nobody has done much in the last week of December. Whatever it is – there are some pretty interesting papers in the list. Tsunami biomarkers! Kaikoura EQ news! Historic EQs! New software! Ridgecrest & Palu! And so much more. Enjoy reading!

    more
  • Christoph GrütznerCC BY-SA 3.0

    Session on Advances in Archaeoseismology: Methods, Techniques, and Case Studies at the ESC 2020, 6-11 Sep, Corfu

    Klaus-G. Hinzen, Fabrizio Galadini, Shmuel Marco, Stathis Stiros, and Amanda M. Gaggioli invite contributions to an archaeoseismology session at the 37. Assembly of the European Seismological Commission (ESC) 2020, September 6-11 in Corfu, Greece. Deadline for abstract submission is April 12th 2020.

    more
  • GoogleEarth

    Special Issue – The 20th anniversary of the Eastern Marmara Earthquakes: Active tectonics of continental strike-slip faults

    A Special Issue on continental strike-slip faults is planned in Mediterranean Geoscience Reviews, a new Springer journal: The 20th anniversary of the Eastern Marmara Earthquakes: Active tectonics of continental strike-slip faults

    […] continental strike-slip faults are complex structures on which the deformation is commonly distributed among a number of parallel to subparallel fault strands, making them in places significantly different in behaviour from their oceanic counterparts.

    Thus, the goal of this issue is to publish a collection of high-quality papers on active tectonics of continental strike-slip faults around the globe using various disciplines, including but not limited to, tectonic geomorphology, paleoseismology, structural geology, crustal deformation, tectonic geodesy and seismology of continental strike-slip faults.

    more
  • Christoph Grützner

    New papers on paleoseismology, earthquakes, and active tectonics (Jan 2020)

    We hope you had a great start into 2020. May the new year bring exciting projects, secure funding, safe travels, and positive reviews. Quite a number of interesting studies have been published in the last few weeks, this is the latest paper round-up. Enjoy reading!

    more
  • Christoph GrütznerCC BY-SA 3.0

    Archaeoseismology – Earthquake damage in Machu Picchu

    A recent study presented at the GSA meeting concludes that the UNESCO World Heritage site of Machu Picchu in Peru was intentionally built on faulted bedrock in order to ease the quarrying of the huge blocks used as construction material (Menegat, 2019). But has Machu Picchu seen big earthquakes in its lifetime? And if so, can it tell us something about their magnitude? After all, there are plenty of earthquakes in Peru, not only at the subduction zone but also in the Andes (e.g., Wimpenny et al., 2018). Some strong instrumental events occurred less than 100 km away from the Inca site. However, in the area of Machu Picchu we knew little about strong earthquakes. That’s why in 2016 a group of researchers from Peru, France, and the UK including myself started to investigate the active faults around Cusco and archaeoseismological damage to Machu Picchu and other famous Inca sites nearby in the CUSCO-PATA project.

    more
  • PATA Days 2020 in Chile – new deadlines

    These are the updated deadlines for the upcoming PATA Days in Chile, November 2020:

    • Short abstract submission (300 words): 28 February, 2020
    • Extended abstract (four pages as usual): 30 March, 2020
    • Initial registration: 28 February, 2020
    • Final registration: 30 March, 2020

    The website with all the relevant information is here: https://www.patadayschile.cl/.

    Here’s the updated 1st circular with the new deadlines (PDF):

  • Christoph Grützner

    New papers on paleoseismology, earthquakes, and active tectonics (Dec 2019)

    Shopping is stressful, reading new papers is exciting. Why not lean back in your favourite comfy chair, enjoy a hot tea and see what’s new in paleoseismology and related fields? These are the latest papers on paleoseismology, earthquakes, and active tectonics.

    more
  • When the fault rings twice: repeated ruptures on the same fault stretch

    The recent publication of a paper on the Weitin Thrust (Papua New Guinea) by Chen, Milliner and Avouac (Fig. 1) gave me the opportunity to dig out and look back to some notes I wrote few months ago. Chen et al. use optical image correlation to document coseismic surface ruptures along the Weitin Thrust occurred in a Mw 8.0 event in 2000 and in a Mw 7.7 event in 2019. The ruptures overlap along a 20-km long portion, with 3-4 m of slip (Fig. 2).

    more

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