Earthquakes and dust clouds

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? Continue reading “Earthquakes and dust clouds”

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)”

Call for abstracts on earthquake effects for 2 sessions at IAEG XII Congress (Torino), 2014

Dear colleagues,

please consider submitting abstracts to the following session to be held at the IAEG XII Congress in Torino, 15-19 September 2014:

  • Off-fault coseismic surface effects and their impact in urban areas
  • Surface fault-rupture hazard in urban areas

Continue reading “Call for abstracts on earthquake effects for 2 sessions at IAEG XII Congress (Torino), 2014”

Small tsunami hits Solomon coast – M8 earthquake and fifty aftershocks

In the last twelve hours, a series of major earthquakes struck the Santa Cruz Islands. Beginning with the activation of a thrust fault with a M8.0 (M7.9) earthquake, almost fifty aftershocks hit the region. A regional tsunami warning was released short six minutes after the first quake at 1:12 UTC and has now been cancelled.

Continue reading “Small tsunami hits Solomon coast – M8 earthquake and fifty aftershocks”

Earthquakes in Austria/Slovenia and Japan

On 2 Februar, a magnitude 4.5 earthquake occurred in shallow depth (~2-7 km) directly at the border between Austria and Slovenia. USGS reports an oblique-slip focal mechanism and a magnitude of Mw4.0 only. According to the Austrian Zentralanstalt für Meteorologie und Geodynamik the quake was felt widely and even in Vienna. Very light damage has been reported from the epicentral area. Continue reading “Earthquakes in Austria/Slovenia and Japan”

What’s up? The Friday links (55)

We’ve seen several magnitude 6 earthquakes last week. On 28 Januar, a shallow M6.1 strike-slip event occurred in eastern Kazakhstan. A little surprise only, we knew about thrust mechanisms in this area, but of course some strike-slip movements do not change the big picture. Would be interesting to check for surface ruptures. This is, by the way, the study area of our friend and colleague Angela Landgraf. Maybe we can convince her to write something about the paleoseismological background of that area? Continue reading “What’s up? The Friday links (55)”