Science Highlights 2010 - UNAVCO Event Response - Mw=8.8 Chile Earthquake Feb. 27, 2010 | UNAVCO
Relevant Data Supersite UNAVCO is hosting the GEO (Group on Earth Observations) Supersite on the 2010 Chilean earthquake, featuring a variety of maps, images, and data. UNAVCO Event Response Forum For information on accessing data including high rate GPS, SAR data, seismic data from the PBO network, UNAVCO GPS equipment availability, and borehole strainmeter data from the PBO network go to our Event Response Forum. GPS Data Available from NASA/GNN Station SANT for Earthquake UNAVCO operates the NASA/GGN GPS station near Santiago (SANT), which is a high rate station set to log at 1 Hz (Fig. 12). The Great Earthquake of Feb. 27th, 2010 A magnitude 8.8 earthquake occurred at 3:34 AM local time (06:36 UTC) off the coast of the Maule region of central Chile. Tectonic Setting of this Event This megathrust earthquake resulted from the release of mechanical strain where the Nazca tectonic plate is being subducted beneath the South American plate. Community Response unavco.org. Community Scientists Dr.
Yamaguchi-gumi
The Sixth Yamaguchi-gumi (六代目山口組, Rokudaime Yamaguchi-gumi?) is Japan's largest and most infamous yakuza organization. It is named after its founder Harukichi Yamaguchi. Its origins can be traced back to a loose labor union for dockworkers in Kobe before World War II.[2] The Yamaguchi-gumi are among the world's wealthiest gangsters, bringing in billions of dollars a year from extortion, gambling, the sex industry, arms and drug trafficking, and real estate and construction kickback schemes. The Yamaguchi-gumi has its headquarters in Kobe, Japan, but it operates all across Japan and has overseas operations in Asia and the United States. Leadership[edit] 1st kumicho (1915–1925): Harukichi Yamaguchi2nd kumicho (1925–1942): Noboru Yamaguchi — son of Harukichi Yamaguchi3rd kumicho (1946–1981): Kazuo Taoka When Taoka inherited the title of kumicho, it was merely a local family with only a few dozen members. 4th kumicho (1984–1985): Masahisa Takenaka 5th kumicho (1989–2005): Yoshinori Watanabe
Ground Truth Trekking Blog » Largest Earthquakes since 1900
This is largely a repeat of part of my post following the 2010 Chile Earthquake, with a few updates and clarifications. Edit: I changed the earthquake magnitude from 8.9 to 9.0 reflecting the USGS’s catalog (as of 16 March 2011). What are the chances? Global occurrence of large earthquakes Does it seem like there are a lot of big earthquakes lately? Haiti, Chile, New Zealand, and Japan have all seen devastating earthquakes in the past 15 months. There is almost certainly no connection between the earthquakes in Haiti and New Zealand and other distant earthquakes. However, the largest earthquakes – those over magnitude 8 – do seem to cluster in time. We’ve been measuring earthquakes since 1900, and the recurrence of the largest ones doesn’t seem random. Click the graphic for data and vector graphic file. And the past decade has been a big one for earthquakes. What does this mean? Why do the biggest earthquakes come in clusters? At this point we don’t really know.
NYTimes
Understanding the Christchurch Earthquake of 22 Feb 2011: magnitude, location and impact | Posts from Keith Woodford
Last September, those of us who live in Christchurch experienced a 7.1 earthquake. Since then, we have referred to that as ‘the big one’, confident that we would never again experience anything similar. In that September quake, there were no lives lost, but there were many houses badly damaged and destroyed. Well, everything has now changed. I do not intend to write here of the overwhelming human tragedy. We read in the media that this was a 6.3 earthquake on the Richter scale. (For those who are interested in the maths of the above numbers, the Richter Scale is logarithmic to base 10; also the energy released is a function of amplitude to the power of 1.5. The strength of the Richter scale (or more accurately the Modified Magnitude Scale) is that it provides an objective measure of the shaking amplitude and hence energy release. The key measure of intensity at a particular location is the ground acceleration. Like this: Like Loading...
7 Degrees of Wiki
Understanding the Christchurch earthquake: building damage | Posts from Keith Woodford
There are many puzzles as to why some of Christchurch’s buildings have survived the 6.3 earthquake of February 2011, and others have not. However, a combination of observations plus document-searching does provide some answers. In terms of magnitude, this was just a moderate earthquake, but the local effects on Christchurch have been huge because of its proximity and shallowness. Even within Christchurch, location was of huge importance, but there is more to it than that. It seems that we do indeed have very stringent building codes in New Zealand. Not only are the codes stringent, but they are enforced. Having planned the building of a new house both in Australia (in the 1980s) and in New Zealand ( in 2001), I know that the building code is a lot stronger here in New Zealand than in Australia. The messages from the 7.1 ‘dress rehearsal’ earthquake on September 2010 seemed reasonably straightforward. Unfortunately, a house with a concrete pad that has cracked and split is history.
Kent Brockman
Tectonics of the M7 earthquake near Christchurch, New Zealand | Highly Allochthonous
This post was written in response to the Darfield earthquake in September 2010. The most recent seismic activity is discussed here. [Updated 8th September 1200 GMT – see bottom of post. The South Island of New Zealand has just been shaken by a large earthquake, reported as a magnitude 7.0 by the USGS. Focal mechanism of September 3rd earthquake, and it's location with respect to the plate boundary in New Zealand As the figure above illustrates, New Zealand is not just located on top of the boundary between the Pacific and Australian plates: it is located at a point where the nature of that plate boundary changes in some rather fundamental ways. New Zealand is a region of distributed deformation: the relative motions between the Australian and Pacific plates are not accommodated on one or two faults in a narrow zone, but on many faults across a much wider zone. Update: 4/9/10 Here’s a couple more plots to that help to further put this earthquake in context. Some other useful links:
