Geobulletin alpha

News from the Geoblogosphere feed

by Stratigraphy.net
New from Snet: Lithologs, a new tool to create lithological/sedimentological logs online..

Blog post recommendation

Links and comments on M8.2 - 95km NW of Iquique, Chile April 2, 2014

This evening there was a M8.2 earthquake along the northern Chilean subduction zone. It caused very strong shaking along the Chilean coast. There have been numerous aftershocks. It was appropriately configured to generate a tsunami. Max heights in the source region are 2 m. It appears that beyond Chile and Peru the tsunami concerns are low (I saw that the expectation was ~20 cm in coastal California).

The Chilean portion of the subduction zone along western South America has generated the largest recorded earthquake historically (in 1960 M9.5; That was on the southern end of the zone). This is in an area where there has been some strong locking noted.

Here are some links: USGS main page: Summary Includes estimated losses (pager) and also expected (shakemap') and felt (dyfi) intensities. Here is low dip focal mechanism consistent with expectations: scientific

This map may work to show the local seismicity: http://earthquake.usgs.gov/earthquakes/map/ Navigate to the region and zoom in.
Try this one too: http://www.iris.edu/seismon/ see this: http://www.iris.edu/ieb/index.html?format=text&nodata=404&starttime=2014-03-14&endtime=2025-01-01&orderby=time-desc&limit=200&maxlat=-18.146&minlat=-21.494&maxlon=-68.577&minlon=-71.630&sbl=1&zm=7&mt=ter

Pacific Tsunami warning center: http://ptwc.weather.gov/?region=1 see the Pacific region statement: http://ptwc.weather.gov/text.php?id=pacific.TSUPAC.2014.04.02.0235 Here is the forecast tsunami height map: http://wcatwc.arh.noaa.gov/events/PAAQ/2014/04/01/n3dm1y/energyn3dm1y.jpg and here is the travel time map: http://wcatwc.arh.noaa.gov/events/PAAQ/2014/04/01/n3dm1y/4/WEAK53/ttvun3dm1y-04.jpg

This site is accumulating observations: http://earthquake-report.com/2014/04/01/massive-earthquake-offshore-tarapaca-chile-on-april-1-2014/

Image showing degree of seismic coupling and location: http://t.co/rgwmyacIw1. See this paper: http://gji.oxfordjournals.org/content/194/3/1283.full

Here are a few useful news links:
http://www.latimes.com/world/worldnow/la-fg-wn-chile-quake-larger-20140401,0,2045484.story#axzz2xgQBG1Wx
http://santiagotimes.cl/8-2-quake-hits-northern-chile-triggering-regional-pacific-wide-tsunami-warning/

Some more educational links:
Tsunamis Generated by Megathrust Earthquakes from IRIS

Stratigraphy.net | Impressum
Ads: