Emil Wiechert was born 150 years ago (26 December 1861). He not only invented modern Geophysics and Seismology, but he also had the first chair of Geophysics worldwide (1898 in Göttingen, Germany). Wiechert became famous for his seismograph. Now the Deutsche Post released a special stamp showing Wiechert, his seismograph and the original seismogram of the 1906 San Francisco earthquake as registered in Göttingen, Germany!
2011-11-11 | in The Friday Links
2011-11-06 | in Earthquake
A series of earthquakes has hit Oklahoma, with a M5.6 being the strongest one. The main quake was preceeded by a M4.8 and several smaller ones. A number of aftershocks took place, some of them stronger than M3.0. The epicentre was situated close to Prague about 50 km west of Oklahoma City. All quakes occured in very shallow depth (< 10 km). No injuries have been reported so far, but it seems that some minor damage occured. Quakes of this strength can be felt over hundreds of kilometers in central and eastern US.
2011-11-04 | in The Friday Links | 2 responses
The Geological Survey of India released a report on earthquake-triggered landslides following the M6.9 Sikkim Earthquake, 18 September 2011. A total of 210 landslides has been reported. That’s earthquake environmental effects!
A special issue on the Christchurch Earthquake has been published in Seismological Research Letters. That’s maybe something I should blog about in greater detail later, so here’s the news and the link only.
2011-10-28 | in The Friday Links
The Turkey M7.2 earthquake turned out to be a really desastrous event. More than 500 people died, more than 2,000 houses were destroyed. Currently, international aid is reaching the epicentral area. Chris Rowan has a good article on the geological background (an earlier one here), History of Geology discusses the paleoseismicity of that region. The German Aerospace Agency (DLR) prepared some quick response maps for the Van and Ercis areas. Nice work!
2011-10-23 | in Earthquake
Update: According to a press release from Bogazici University, intensities reached VIII. They also claim a depth of 5 km only. 138 people died, 350 were wounded and 970 buildings collapsed.
An earthquake with a magnitude of Mw 7.2 (EMSC: Mw 7.3) occured in Eastern Tureky in a depth of 10 – 20 km. The epicentre was situated close to the city of Van. More than 30 houses collapsed according to first reports. Despite only several dozens of people have been confirmed dead until now, the earthquake could have caused hundreds of fatalities. Surprisingly, the quake did neither happen at the North Anatolian Fault Zone nor at the East Anatolian Fault Zone. Those two strike slip systems are considered as the most dangerous faults in Turkey. The Van area lies in a broad zone of convergent movement of the Arabian plate vs. Eurasia, and mapped faults are in concordance with the oblique thrust mechanism observed at the 23 October 2011 event. Convergence rate is in the order of 25 mm/a there. more
2011-10-21 | in The Friday Links
Let’s start with some good news: The first two Galileo satellites (Natalia and Thijs) will be launched today from Kourou. It’s a little behind the schedule (6 years) and the entire project has become a little more expensive than previously thought (1,600,000,000 €), but who cares? It will provide 1 m GPS resolution! 1 m!!!
There is one more Archaeopteryx! Really! Soemone who does not want his name to be told handed out the fossil to scientists. After a thoroughly investigation of that great piece of Solnhofen Plattenkalk, the anonymous collector will get back his bird. No, his dinosaur I mean. Ehm, his Archaeopteryx.
2011-10-17 | in Corinth 2011
hopefully, everybody has returned well and everybody enjoyed the meeting,
we have received a lot of mails and the feedback is fantastic. THANK YOU!
The updated abstract volume will be ready for download soon. You will receive an extra mail with the link or can just visit paleoseismicity.org.
2011-08-31 | in Paper
A new paper published in Natural Hazards today discusses post-depositional changes of tsunamites. At sites in Thailand covered by sediments of the 2004 Sumatra tsunami, Szczuciński (2011) has documented significant changes in the deposits over the last seven years. Not only were the tsunamites altered, eroded or re-deposited by animals and seasonal rain, but also vanished in certain cases.
GSA Special Paper 479 – Geological Criteria for Evaluating Seismicity Revisited: Forty Years of Paleoseismic Investigations and the Natural Record of Past Earthquakes2011-08-29 | in Paper
A new book with focus on paleoseismology has been published by GSA. Special Paper 479 – “Geological Criteria for Evaluating Seismicity Revisited: Forty Years of Paleoseismic Investigations and the Natural Record of Past Earthquakes” is edited by Franck A. Audemard M., Alessandro Maria Michetti and James P. McCalpin. Again, a lot of interesting reading stuff for your flight to Corinth…