Category Archives: Earthquakes

Sumatra 9.0 Quake Set Off Quakes a Record 7,000 Miles Away on Mount Wrangell in Alaska

Sitnews reports that the 9.0 Sumatra earthquake that touched off the Boxing Day Tidal initiated 12 tiny earthquakes on Mount Wrangell, the 14,163 foot volcano in Alaska. Authorities believe this would be the longest documented reported of related quakes (7,000 miles). Wrangell heated up after the Good Friday 9.2 Alaska Quake in 1964 but ironically the 7.9 Denali fault quake in 2002 caused the mountain to calm down. Other Alaska volcanoes were not affected by the 2004 quake.

Lack of Attention to 1983 Borah Earthquake Raised in Idaho Gold Mine Controversy

The Boise Weekly reports Idaho has received its first application in more than 10 years for a new cyanidation gold mining facility. Desert Mineral Mining’s proposed small facility is located a 15-mile crow’s flight from downtown Boise off of Blacks Creek Road in northwest Elmore County. The article notes that 90 percent of the gold mined in the U.S.uses cyanide. The article criticizes the application because it is not even mention the earthquake hazard of the Borah 7.3 quake in 1983.
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13,000 Earthquakes in Hawaii in 2004 (average is 10,000)

The Honolulu Advertiser reports that there were 13,000 earthquakes were recorded in 2004 by the U.S. Geological Survey’s Hawaiian Volcano Observatory, only three were greater than magnitude 4. The average is 10,000 but Observatory seismologist Paul Okubo said there were fewer moderate to large quakes in the past year. There were 4,228 quakes were magnitude 1.5 or greater, and only 79 were big enough to have been felt by Big Island residents. The three largest quakes of 2004 — none greater than 4.5 — occurred beneath Kilauea on Feb. 5, Oct. 11 and Oct. 12. The principal source of earthquakes are Kilauea, Mauna Loa and Lo’ihi, all active volcanoes. Lo’ihi, about 6 miles south of the Big Island and 2,000 feet deep, is the youngest. It is expected to rise above sea level sometime in the next few thousand years. The most recent big earthquake in Hawai’i occurred in 1975 when a magnitude 7.2 temblor shook the Big Island, causing a tsunami that killed two campers in Halape, Puna.
The article was prompted by a 3.6 quake this week between Waiki’i and the Mauna Kea summit at a depth of 13 miles. Books on earthquakes.

Study: Yellowstone Earthquakes Peak in Late Spring/Early Summer (snow melt cause suspected)

An AP article published in the Billings Gazette and other publications notes that most of Yellowstone’s earthquakes occur in late spring and early summer. The study by Lizet Christiansen of the U.S. Geological Survey suspects that snow melt is responsible. Most of the earthquakes that shake Yellowstone National Park happen during the busiest time of year – but hardly anyone notices. The study analyzed earthquakes between 1984 and 2004 at Yellowstone, the Long Valley caldera in eastern California, and Mount Lassen, Mount Hood, Mount St. Helens and Mount Rainier.