An Indian Ocean tsunami triggered remotely by the onshore M7.7 earthquake in Balochistan, Pakistan, on 2013-09-24

On 24 September, 2013, a magnitude 7.7 earthquake occurred in Balochistan, Pakistan. The quake caused intense ground motions and had dramatic consequences – hundreds of people died, and more than 100,000 lost their homes. A secondary effect which caught much attention in the international media was the birth of an island off the Pakistani coast – Zalzala Jazeera or Earthquake Island. Another effect which went almost completely unnoticed was a small tsunami in the Arabian Sea. The tsunami reached wave heights of around 1 m at the Omani coast. In a paper which was recently published in Geology, my colleagues and me document the tsunami effects in Oman. We conclude on a submarine slide off Pakistan as the likely trigger mechanism.

Continue reading “An Indian Ocean tsunami triggered remotely by the onshore M7.7 earthquake in Balochistan, Pakistan, on 2013-09-24”

New papers on lacustrine turbidites, coseismic landslides in NZ, active faults in Iran, and paleoseismology in Ecuador

Old books

I came across several interesting papers on paleoseismology and related disciplines, most of them published recently. They deal with “classical” paleoseismology, with earthquake environmental effects like coseismic landslides and tsunamis, and also with geomorphological indicators for active faulting. Let me know if I missed some! Continue reading “New papers on lacustrine turbidites, coseismic landslides in NZ, active faults in Iran, and paleoseismology in Ecuador”

Some photos of EEEs caused by the Cephalonia M6.0 earthquake

On 26 January and 3 February, two strong and shallow earthquakes of magnitude 6+ occured at the island of Kefalonia/Cephalonia in Western Greece. The events caused intense damage to buildings and infrastructure. A team of EERI (Earthquake Engineering Research Institute) scientists went to the island to map these kind of damages. Earthquake Environmental Effects (EEE) like rockfalls, landslides, and lateral spreading were also caused by the events. George Papathanassiou and his colleagues mapped these features and sent me the following photos from Lixouri. Continue reading “Some photos of EEEs caused by the Cephalonia M6.0 earthquake”

Two M6+ earthquakes in Kefalonia (Greece) within 8 days

Two earthquakes of magnitude M6+ occured near the island of Kefalonia in Western Greece on 26 January and 3 February, 2014. Both were shallow strike slip events that are associated with the Kefalonia transform fault and caused not only damages to buildings and infrastructure, but also significant earthquake environmental effects (EEEs). Here I compile some photo and video sources from rockfalls and other features. Continue reading “Two M6+ earthquakes in Kefalonia (Greece) within 8 days”

Special Issue “Geology and Archaeology of Earthquakes” in Cuaternario y Geomorfología

A special issue on “Geology and Archaeology of Earthquakes” has currently been published in Cuaternario y Geomorfología (Quaternary and Geomoprhology, ISSN: 0214-1744), which is the official journal of the Spanish Quaternary Union (AEQUA) and the Spanish Geomorphological Society (SEG): Vol 27, No 3-4 (2013) – Geología y Arqueología de Terremotos. The issue includes an introduction and ten research papers on earthquake geology and archaeoseismology of the Iberian Peninsula. Most papers are in English, few in Spanish. Continue reading “Special Issue “Geology and Archaeology of Earthquakes” in Cuaternario y Geomorfología”

Report on the Mw7.1 Bohol, Philippines earthquake of 15 October 2013 by Stéphane Baize (IRSN)

On 15 October, 2013 a shallow Mw7.1 earthquake occured in Bohol, Philippines. The quake caused more than 200 fatalities and severe damages. Instrumental intensities of VIII – IX were recorded and the USGS estimates the maximum slip to be around 120 cm. Stéphane Baize from the French IRSN created a report not only on the seismological and tectonic background of the earthquake, but also on the earthquake environmental effects (EEEs) that were caused by the event. Continue reading “Report on the Mw7.1 Bohol, Philippines earthquake of 15 October 2013 by Stéphane Baize (IRSN)”

What’s up? The Friday links (58)

It’s time to revive the Friday Links tradition, I just realized that it fell asleep in March…

A paper published in Science few hours ago deals with the energy release of one of the strangest mega-quakes that we have ever observed, the M8.3 Okhotsk event of 24 May 2013. The interesting thing is that is occurred in more than 600 km depth! In the same issue of the journal another paper describes attempts to perform analogue experiments of such events in the lab. If you just want to get a rough idea about the studies or have no access to science, I recommend to check out Andrew Alden’s article at kqed science. Continue reading “What’s up? The Friday links (58)”

Earthquake-induced landslides in the Appennines – distance versus magnitude and ESI epicentral intensity

A new paper by Esposito et al. has been published in Springer’s Landslide Science and Practice that will help to better constrain intensities on the ESI scale. Landslides induced by twelve moderate to strong earthquakes events during the last 300 yrs have been analyzed. The authors calculated distance vs. magnitude and distance vs. ESI epicentral intensity relationships, similar to the famous correlations by Keefer (1984). Continue reading “Earthquake-induced landslides in the Appennines – distance versus magnitude and ESI epicentral intensity”

What’s up? The Friday links (56)

It’s been a while since the last Friday links, so today’s list is rather long. Of course the Russian meteoroid-meteor-meteorite (yes, in this order!) was an absolutely amazing, though destructive phenomenon. The air blast was registered equivalent to an earthquake of magnitude 2.7. Read Livescience’s article here and read this text to get to know about meteors and seismograms in general. Continue reading “What’s up? The Friday links (56)”