Posts in the category »   «  ( 91 Posts )

New year, new links, same weekday! Despite many geobloggers are still in their season breaks, today is still Friday, so here are your links!

more

A short week full of Christmas events and defenses and farewells has passed here at my university, so this round-up is also to remind myself what I’ve missed… Today is Friday and here are your links!

more

The SSA 2015 meeting will take place in Pasadena, CA, from 21-23 April. As always, there will be plenty of interesting things for paleoseismologists. Scott Bennett asked me to advertise the following session that deals with a topic most of us will find highly important:

How Reliable Are Reconstructions and Models of Surface-Rupturing Earthquakes?

Abstract deadline is 9 January, 2015. more

The 2nd Historical Earthquake Colloquium will be held in Strasbourg, France, from 12-13 May, 2015. It focusses on Major Historical Earthquakes of the Rhine Graben and Intraplate Europe – From archives to comparative seismotectonics.

Following the first edition dedicated to historical earthquakes held in Freiburg (May 19 and 20, 2014), this meeting will focus on seismological studies of the Rhine Graben and intraplate Europe. The meeting will also address the relationships between recent seismicity, non-instrumental earthquakes and their seismotectonic characteristics. Contributions on historical, instrumental seismology and induced seismicity
are welcome. We also encourage presentations in seismotectonics, paleoseismology, archeoseismology and seismic hazard assessment.
We propose three sessions:

more

The Deform2015 school on Active Deformation, Faults and Earthquakes from Measurements to Models will be held in Southern France from 7-13 February, 2015.
Over the past years, considerable advances have been made in observing crustal deformation at scales of seconds to thousands of years.
However, a unified view of the earthquake cycle is still missing. The thematic school aims at bringing together students and scientists
working on different aspects of active faulting and earthquake processes. This school will provide a state-of-the-art view of the technics used to study active deformation as well as a perspective on the current models integrating the growing corpus of available data.

more

Several new papers deal with paleoseismology and active tectonics studies. Wiatr et al. used terrestrial LiDAR to analyse limestone bedrock scarps, Hornblow et al. investigated the Darfield earthquake source in NZ. Sarikaya et al. present new data on offset alluvial fans in Central Turkey; Xu et al. present geological data on two historical seismic events in Tibet. Tectonic morphology is used by Barcelona et al. in NW Argentina. Mathew et al. use remote sensing data to analyze coseismic deformation in China. Ed Garrett and colleagues present data on 1000 years of megathrust quakes in Chile, and Bemis et al. have an interesting article on UAVs and paleoseismology. more

Our colleague Tim Dawson from the California Geological Survey (CGS) pointed me to this website, where reports and data on the Napa Earthquake of 24 August, 2014, are collected. There is a new document available for download, the EERI report at the top of the page, which adds some previously unpublished information, especially on the observed afterslip. Tim writes that “afterslip along the central 6-7 km of the rupture is about 35 cm (whereas it was initially only about 20 cm the day of the earthquake).” The afterslip seems to be still ongoing and is monitored with InSAR. more

The 6th INQUA workshop on Active Tectonics, Paleoseismology and Archaeoseismology will be held from 19-24 April, 2015, in Pescina, Fucino Basin, Italy.

We will remember the centenary of the 1915 M7 Fucino earthquake, that was one of the largest and most devastating earthquakes ever occurred in Central Italy.

more

The 2011 Christchurch earthquake series had severe consequences and surprised scientists for many reasons. Ground motions were extremely strong despite the relative moderate magnitudes of the quakes (M_W 5.3-7.1). The events happened on a system of hitherto unknown faults, some of which are located directly below Christchurch. Earthquake environmental effects (EEE), especially liquefaction, were intense and widespread. It turned out that subsequent quakes reactivated the same feeder dikes of sand blows, showing that saturated sediments are susceptible of liquefaction no matter if they had been liquefied recently (also see the paper of Quigley et al. (2013) on the liquefaction effects). Another stunning lesson was the occurrence of intense rockfall in the vicinity of Christchurch. In a recently published study, Mackey and Quigley (2014) dated rockfall boulders with ³He and show that they allow to estimate the recurrence intervall of local seismic events like the 2011 series. This works is a very interesting way to use EEE for paleo-earthquake studies. more

A couple of new papers on paleoseismology and related fields have recently been published. They deal with active tectonics in China, coseismic uplift in Japan, seismites in Canada, turbidite and lake sediment paleoseismology, earthquake environmental effects in Greece, paleotsunami deposits in India, an earthquake and tsunami in 1531 in Lisbon, tsunamites in Malta, tectonic geomorphology, scaling relationships in the Med,  and the 2013 Balochistan earthquake and subsequent tsunami. If you miss recent studies here, drop us a mail. more