Mw9.0 earthquake hits Japan, causes Tsunami (updated – 3)

An earthquake with a magnitude of Mw9.0 has occured 130 km east of Honshu, Japan in a depth of ~25 km. This had been the fourth or fifth strongest earthquake to be recorded by instrumental seismology. The quake caused significant destruction to the Honshu Island and triggered a tsunami that  destroyed a number of harbours. In some places (Sendai), tsunami heights were reported to exceed 10 m. A tsunami warning has been released for wide parts of the Pacific, but in Hawaii only 1 m was observed, therefore the warnings for the US West Coast have been lowered. Continue reading “Mw9.0 earthquake hits Japan, causes Tsunami (updated – 3)”

What’s up? The Friday links (8)

The Christchurch earthquake was the main topic of the Geoblogosphere this week. A great analysis on the effects was provided by Dave Petley in his Landslide Blog. Highly Allochthonous reasoned on seismic lensing, Ontario Geofish posted a lot on building security, and countless news sites came up with photos and reports. Frank Taylor, who hosted the GoogleEarthBlog before he left for a sailing trip around the world, was in Christchurch next to the Cathedral when the quake happened. On his Tahina Expedition website he reports on his experiences.

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Why was the Christchurch earthquake so devastating?

A M6.3 earthquake hit Christchurch, New Zealand on 22 February (21 Feb in UTC), leaving at least 75 people dead and hundreds injured or missing. Hundreds of houses were destroyed, including the Christchurch Cathedral, and damages will probably sum up to some billion dollars. On 4 September 2010 (3 Sept in UTC), a M7.0 event struck Christchurch, but then no one was killed. So: what’s the difference between the two events?

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What’s up? The Friday links (6)

Today on Friday, 11 February, a magnitude 7.0 earthquake occurred offshore in Chile near Concepcion at  36.5° S and 73° W in a depth of 28km. The MMI at the nearby large cities was reported by the USGS with V.

Update: The magnitude was corrected to 6.8. The earthquake was followed one hour later by a further event with a magnitude of 5.3 and 4 hours later again by a more shallow 6.3.
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What’s up? The Friday links (4)

The California Geological Survey provides a great online-tool for geoscientist: A fault map of California (Alquist-Priolo-Fault-Zone with all datasets available in PDF and GIS format for free! Start here.

A volunteer panel that assesses earthquake risks in Utah said it examined nearly 130 school buildings in the state and found more than half fail to meet federal earthquake safety guidelines. Bad news from here.

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Job Openings: Five research geologists, tectonics for USGS Alaska

The Alaska Science Center is advertising five new permanent research geologist positions.  Applications are open between December 1, 2010 and February 15, 2011, and that selection will occur during late spring of 2011. More information on their homepage, including the following announcement:

“This hiring initiative inaugurates a team approach to geologic research in Alaska (Photo gallery). The five positions will together make up a working group that will respond to the USGS’ ongoing need for research in framework geology of the 49th state.  Project work is expected to support a broad range of research topics related to crustal evolution and surficial processes.  We expect projects will involve collaboration with researchers from other USGS offices, federal agencies, state agencies, and academia.
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What’s up? The Friday links (3)

The L’Aquila earthquake from 6 April, 2009 caused more than 308 fatalities and destroyed about 15,000 buildings. A new initiative set up by the British architect Barnaby Gunning aims on creating a 3D model of the destroyed city in its present state with SketchUp for GoogleEarth. The model will be used for “creating a valuable resourcef for masterplanning the reconstruction”, Gunning states on the project’s homepage. Continue reading “What’s up? The Friday links (3)”