The geometry, length, and displacement of fault ruptures that breach the surface provide critical information on the behavior of faults during seismic events (coseismic deformation), and on their long-term behavior. The study of coseismic fault ruptures has concentrated almost exclusively along continental faults, while submarine studies have been scarce, and only a few provided quantitative constraints in parameters such as fault displacement (e.g., Tohoku Earthquake). In addition to represent more than two thirds of the Earth’s seismicity, submarine faults can also be associated with tsunamis, potentially increasing the seismic hazard that these structures pose.
Guest blog by Javier Escartín (IPGP) & Frédérique Leclerc (EOS): Studying coseismic deformation along submarine faults
July 3, 2016 | in Paper
Today’s paper round-up is rather short. Maybe this is due to the start of the field work season and many editors being involved in field research, maybe it’s just holiday season. Maybe I’ve missed some papers because I have been in the field, too. However, there are some very interesting studies, especially concerning tsunamis. Enjoy reading and please tell me what I’ve missed in the comments.
July 1, 2016 | in Jobs
An interesting opportunity for a postdoc position is currently open at Potsdam University, Germany. If you have a clever research idea, the university will basically support you and help establishing a research group via applying for more advanced funding schemes. So it’s a bit of an unusual advert, but certainly a nice one. Here’s the advert (ruthlessly copied from Potsdam University): more
June 17, 2016 | in Jobs
The CEREGE laboratory in Aix-en-Provence (France) look for a PostDoc in the field of seismic hazard and/or earthquake geology. The position is in the framework of the RISKMED OT MED funded project “ Natural risks in the Mediterranean: Hazard, vulnerability, perception and management”.
Deadline for application is 4 July.
- Organisation and implementation of field surveys in Italy and Turkey in collaboration with local colleagues.
- Review and compile existing data, and acquire new data to better understand the frequency and dynamics of large earthquakes in Central Italy and western Turkey through surface observations and paleoseismological reconstruction over a range of different temporal and spatial scales.
- Convert all data into an open database.
- Analyze and interpret all data with respect to existing scaling laws and in terms of seismic hazard.
- Produce with social scientists engaged in the project (geographers and psychologists) comprehensible scientific information to public and territorial managers as the basis for recommended preparedness and mitigation actions.
- Participate to a participatory process and to focus groups concerning risk mitigation strategies (science communication, risk communication, public outreach) in targeted areas.
See the full details here.
Christoph GrütznerJune 10, 2016 | in Jobs
The University of Oxford is looking for a PostDoc research assistant under the direction of Professor Richard Walker and Professor Philip England to work on active tectonics in China. The focus is on the Hexi corridor and the Qilian Shan of Gansu. Deadline for application is 15 July 2016.
- Detailed mapping of palaeo-earthquake ruptures
- Construction of slip distributions from individual earthquakes
- Selection of sites for long-term slip-rate determination using field investigations, high-resolution satellite imagery and digital topography
- Planning and carrying out fieldwork to verify remote-sensing observations, to collect samples for dating, and to excavate and interpret palaeo-seismic trenches
See the full job description here.
The 7th International INQUA Workshop on Paleoseismology, Active Tectonics and Archaeoseismology (PATA Days) took place last week in Crestone, CO. The meeting was organised by Jim McCalpin who did an amazing job – thanks Jim for inviting us to Crestone and for this wonderful conference. Prior to the meeting a six-day road trip to the Faults of the Wild West lead a group of ~20 people to the legendary sites of western US faults: Borah Peak, the Tetons, Wasatch, etc. On 29 May most participants gathered in Denver where the icebreaker took place. Early in the morning next day we started with a pre-meeting field trip to Crestone, driving into the Rocky Mountains, passing South Park, and arriving at Crestone just on time for lunch. more
June 8, 2016 | in Paper | 5 responses
It’s June and it’s time for a new paper round-up, isn’t it? When I compiled the list during the past weeks I already realized that there’s a lot of new literature out there, and I guess this month’s post is probably the longest list we’ve ever had – 21 articles! So here are the latest papers on paleoseismology, tsunamis (maaaany tsunami papers this time), and active tectonics. As always: Any suggestions are highly appreciated. Enjoy reading!
Steve Evans - Khait rock avalancheJune 1, 2016 | in Paper
Some weeks ago we published a new study on the classification of earthquake-induced landslide event sizes based on seismotectonic, topographic, climatic and geologic factors. Our idea was that this classification could be used to help improve seismic hazard assessment by contributing to a better prediction of landslide hazards induced by an earthquake when the geologic, topographic and climatic context is well defined. Possible applications could be the short-term prediction right after an earthquake or scenario modeling, e.g. for critical infrastructure. Since earthquake triggered landslide event sizes are also an important proxy for the estimation of magnitude and intensity of past earthquakes, I thought our study might be interesting for the paleoseismicity community as well, and so I put together a brief summary.
Christian HillemannAll rights reserved
Between 1885 and 1938, the northern Tien Shan at the border between present Kyrgyzstan and Kazakhstan experienced a remarkable series of five major earthquakes, exceeding M6.9 and reaching up to M ~ 8 (1885 Belovodskoe M6.9, 1887 Verny M7.3, 1889 Chilik M~8, 1911 Chon Kemin M8, and 1938 Kemino Chu M6.9). Combined, the seismic moments add up to almost moment magnitude 9, which is a significant amount of strain released in roughly 50 years and across an E-W stretch of less than 500 kilometers. Even more intriguing is the fact that the ruptured region is located more than thousand km north of the nearest plate boundary and associated India-Eurasia collision zone. The macroseismic areas of these earthquakes include the present-day capital of Kyrgyzstan, Bishkek (Frunze) and the former capital and still largest city of Kazakhstan, Almaty (earlier names Alma Ata and Verny).
USGSpublic domainMay 22, 2016 | in Earthquake
A team of Ecuadorian and French geologists has started to map the coseismic effects of the M7.8 earthquake that hit Ecuador on 16 April, 2016. The quake occurred at a depth of about 20 km and caused more than 600 fatalities, mainly in the area near Muisne. Two strong aftershocks of M6.7 and M6.8 shook the epicentral area on 18 May, among hundreds of smaller shocks that were recorded. The mapping is coordinated by the Instituto Geofísico. First results show earthquake environmental effects like liquefaction, mud venting, and surface cracks. Some impressions from the field work can be found here: