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LAKEVIEW -- A swarm of earthquakes, the biggest a 4.6, has struck for several weeks about 40 miles southeast of Lakeview, Ore. There were two quakes early Wednesday morning, at 3.7 and 3.5 magnitude. The 4.6 magnitude earthquake was late Tuesday evening. A day earlier, there was a 4.1 quake. On Oct. 6, there was 4.1 quake and on Oct. 23, a 2.2 magnitude quake.
Nobody at all is reporting on this, although it's no secret either. There is an oddly shallow and very active quake swarm occurring in NW Nevada, about 65 KM ESE of Lakeview, Oregon (as USGS reports it) and it has been going on now for over a week and a half. The area the quakes are occurring in does not seem to have any significant human population, and appears to be mostly mountainous desert, overlain by igneous rocks of what I'm guessing are older than pliestocene. There isn't a lot of info on the area, much less any geological information I'm able to find.
Looks like the media and geologists are finally taking notice of this quake swarm. So far, indications are that it is purely tectonic, but they don't know yet. The area has a history of tectonic activity, however this swarm appears to be unprecedented for the region. Here are the few reports I could find on this: www.oregonlive.com... www.rgj.com...
Native Americans may have occupied the area around Lakeview for as much as 14,000 years, as evidenced by artifacts found in the Paisley Caves north of Lakeview. When the first white explorers came through the Goose Lake Valley, Shoshone speaking people were living in the area. In 1827, Peter Skene Ogden led a brigade of Hudson's Bay Company trappers through the Goose Lake Valley. He was followed in 1832 by John Work and his trappers. Work noted the hot springs north Goose Lake (now called Hunter's Hot Springs) in his journal. The hot springs are approximately 2 miles (3.2 km) north the Lakeview town site.
The area around the Goose Lake Valley was formed by faulted blocking. There are numerous bounding faults on the west and east side of the valley. The valley itself is an alluvial basin. Its underlying strata were formed by Pliocene and Pleistocene lava flows covered by Holocene sedimentary deposits. It is bounded by Pliocene and Tertiary basalt that form the Fremont and Warner Mountains, and on the south and southwest by Pliocene basalt of the Modoc Plateau. In the Goose Lake area, volcanic rock from the Pliocene is up to 500 feet (150 m) thick. This is topped with additional layers of Pleistocene basalt up to 200 feet (61 m) thick. The upper levels of strata are sedimentary deposits from the Holocene, which are 1,000 feet (300 m) thick in some areas. The upper alluvial layers consist of partially stratified sand and silt mixed with layers of gravel. These deposits are permeable and provide the valley with groundwater. Calcium bicarbonate occurs in the groundwater throughout the basin. The entire valley was once covered by a single vast pluvial lake that may have been 300 feet (91 m) deep during the Pleistocene Epoch. However, during the Holocene Epoch water level gradually receded leaving a large endorheic lake. Today, the lake is known as Goose Lake and is only 24 feet (7.3 m) deep at its deepest point.