After today’s Earthquake in Chile and subsequent Tsunami Warning, this was of some interest. The Yellowstone Caldera I have known for a while. It’s what makes the geysers there. It’s also what is over the largest “Hot Spot” on earth and hasn’t blown for over 600 000 years. The Hawaiian Islands are the result of the earth’s crust moving over a Hot Spot there. That has caused the string of islands a thousand mile long. Some on the western edge are just dots in the water. Eventually Kauai will be that way, then Oahu. But there is new island forming SE of Hawaii.
YELLOWSTONE VOLCANO OBSERVATORY INFORMATION STATEMENT
Monday, February 8, 2010 5:57 PM MST (Tuesday, February 9, 2010 0057 UTC)
44°25’48″ N 110°40’12″ W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN
The January-February, 2010, earthquake swarm at Yellowstone National Park has diminished in terms of earthquake-occurrence rate and magnitudes. A few small events continue to be recorded each day at the University of Utah Seismograph Stations (UUSS), the YVO partner responsible for earthquake monitoring at Yellowstone National Park. Seismologists cannot state that the swarm has ceased, but the rate of earthquake occurrence in the Madison Plateau area is now at background levels for this area of Yellowstone. As such, UUSS and YVO will cease to issue daily updates unless conditions change.
As of February 8, 2010 14:00 MST, there have been 1799 events recorded by the automatic earthquake system of the University of Utah. Of those, 827 have been verified by seismic analysts and forwarded to the National Earthquake Information Center (NEIC) for incorporation in the permanent listing of earthquakes. Seismologists of the University of Utah will continue to analyze data from the past several weeks to finalize the earthquake information.
The largest events were a pair of earthquakes of magnitude 3.7 and 3.8 that occurred after 11 PM MST on January 20, 2010. Both events were felt throughout the park and in surrounding communities in Wyoming, Montana, and Idaho. Other smaller events were also reported as felt.
The earthquakes were on the Madison Plateau along the northwest side of the Yellowstone caldera, in an area where previous swarms had occurred over the past 30 years. Visual observation of landforms and geothermal features by Yellowstone National Park personnel did not show any changes that could be attributed to the earthquakes.
Yellowstone National Park is in a region of active seismicity associated with regional Basin and Range extension of the Western U.S., as well as youthful volcanism of the Yellowstone volcanic field. Pressurization due to crustal magma bodies of the Yellowstone hotspot and associated shallow geothermal reservoirs can also contribute to earthquakes. Scientists will continue to research the origin of these and other Yellowstone earthquakes.
And from MSNBC They ask if Momma Nature is out of Control – No, Momma’s in Control. We’re here for the ride:
Big quake question: Are they getting worse?
Seismic shockers are to be expected, but planet seems to be more active
Chile is on a hotspot of sorts for earthquake activity. And so the 8.8-magnitude temblor that shook the region overnight was not a surprise, historically speaking. Nor was it outside the realm of normal, scientists say, even though it comes on the heels of other major earthquakes.
One scientist, however, says that relative to the time period from the mid-1970s to the mid-1990s, Earth has been more active over the past 15 years or so.
The Chilean earthquake, and the tsunami it spawned, originated on a hot spot known as a subduction zone, where one plate of Earth’s crust dives under another. It’s part of the active “Ring of Fire,” a zone of major crustal plate clashes that surround the Pacific Ocean.
More at the link: http://www.msnbc.msn.com/id/35618526/