Today’s post of the Landslide Blog about a rockfall caused by a volcanic earthquake reminds me about something that’s in my mind for years already. Could we use dust deposits as a paleoseismological archive? Dust clouds of all sizes, ranging from tiny to huge, can be associated with seismic shaking, especially in arid and mountainous regions. Here I have collected a few videos I found on YouTube. When large amounts of dust settle they should form a distinctive layer recognizable in the sedimentary record, comparable to volcanic ash deposits. Of course they will be harder to be identified, since the material is the local one. I guess this could be done, similar to turbidites in marine paleoseismology. There are papers that describe changes in the aerosol content in the atmosphere after earthquakes, so why not look for them on earth? more
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February 25, 2013 | in Earthquake | one response
November 2, 2012 | in The Friday Links
The German research vessel R/V Polarstern is an ice-breaking mega laboratory and the heart of the German arctic and antarctic research. It is maintained by the AWI Bremerhaven (Alfred Wegener Institut for Polar and Marine Research). When I studied Geophysics at Leipzig University, I had to chance to visit this great ship during an excursion. Now the Polarstern is on her way for the Antarctic again, and this time the ship and the crew will spend the winter down far south for the very first time. Follow their campaign via the AWI blog or the GEO blog.
For me the most important geo news this week was the court decision on the L’Aquila trial on Monday. A local court sentenced six scientists and one official for manslaughter to six years in prison – 2 years more than claimed by the prosecutor. Even though the scientists may not have found the best words to describe the earthquake hazard in L’Aquila, the decision is ridiculous in my opinion and caused an outcry throughout the scientific community. Especially the consequences for any risk assessment and public information might be fatal. I am really concerned. In the following I link to some blog posts that I found particularly interesting:
Annals of Geophysics, the former Annali di Geofisica, published its latest issue today, dedicated to the 2012 Northern Italy earthquakes: Vol 55, No 4 (2012): The Emilia (northern Italy) seismic sequence of May-June, 2012: preliminary data and results. On 20 May 2012 an earthquake with a magnitude of Mw6.1 hit Finale Emilia, on 29 May an Mw5.8 event followed. The earthquakes caused a number of fatalities and significant damage. Earthquake environmental effects were widely observed, too. more
June 26, 2012 | in Uncategorized
Our colleagues from the Bulgarian Academy of Science, Geological Institute “Strashimir Dimitrov“, have published a report on the coseismic and secondary effects of the May 22, 2012 Pernik earthquake, Western Bulgaria. The earthquake had a magnitude of MW5.6, see this special website of EMSC. Radulov et al. report intensities of up to VII (MSK) and various coseismic and secondary earthquake effects. more
June 6, 2012 | in Paper
Three papers published recently caught my eyes. First, Andrej Gosar investigated the earthquake environmental effects (EEEs) of the 12 April 1998 Mw =5.6 Krn Mountains earthquake, Slovenia. The quake measured VII-VIII on the EMS-98 scale, and Andrej found that the intensities reached the same values on the ESI2007 scale. He reports that the intensity distributions for both scales are comparable, but show some differences due to the sparsely populated epicentral area. The research concentrated on rockfalls for EEE determination. It’s a nice example that also moderate events can be characterized using the ESI2007 scale.
May 31, 2012 | in Earthquake
The University Insubria (Como, Italy) has published the first report on the earthquake environmental effects that accompanied the Northern Italy “Finale Emilia Earthquake” of 20 May, 2012. On that day, a quake with magnitude Mw6.1 rocked the Po Plain, leaving seven people dead and hundreds of houses damaged. On 29 May, a very strong M5.8 aftershock occurred in the region. more
3rd INQUA-IGCP 567 International Workshop on Active Tectonics, Paleoseismology and Archeoseismology, Morelia (Mexico), 18 – 24 November 2012
The 3rd INQUA-IGCP 567 International Workshop on Active Tectonics, Paleoseismology and Archeoseismology will be held in Morelia (Mexico) from 18 – 24 November 2012. The workshop is the continuation of the BaeloClaudia2009 and Corinth2011 events. We invite all scientists in the fields of earthquake geology, paleoseismology, archeoseismology, tsunami studies, earthquake engineering, seismic hazard assessment to participate in the workshop. We will try to provide travel grants from INQUA and IGCP for young scientists. See Acambay1912.org for detailled information, registration and abstract submission.
March 26, 2012 | in Meeting
Dear friends and colleagues,
we would like to remind you that there is less than a week left before the deadline for abstract submission – March 31, 2012 for the ESC-12 conference (http://www.esc2012-moscow.org/index.html).
We invite you to take part in a Paleoseismology symposium: