Magnitude 5.3 Off Coast Of Oregon
| MAP | 5.3 | 2010/07/28 16:12:06 | 43.770 | -125.802 | 10.0 | 129 km ( 80 mi) WNW of Barview, OR |
Entries Tagged as 'Oregon'
Oregon Due For Major Quake?
The other day I wrote about the Mogi Doughnut Hypothesis and it occurred to me looking at the map of Oregon and Washington that while we are both earthquake prone states, Oregon has been quirt a long time. Are we living in a Mogi Doughnut?
Mt. Hood Is Restless
“Hush little baby don’t you cry.”
map 1.9 2010/07/14 11:04:04 45.364N 121.754W 5.2 17 km (11 mi) E of Mount Hood Village, OR
I don’t want to read about Mt. Hood coming back to life.
Does It Mean Anything?
Since the 13th of June we’ve had an unusual number of micro-quakes in the Mt. Hood area. Six in the Mt. Hood Village area, all about four miles deep and two in the Parkdale area about 5 miles down.
Notes on the Baja Earthquake
Andrew’s Geology Blog has the latest on the geology of the Easter quake in the Baja and the findings have implications for those of us who live in the Willamette Valley of Oregon.
Three Oregon Quakes
| MAP | 4.1 | 2010/05/14 19:33:02 | 42.232 | -126.467 | 10.0 | 170 km (105 mi) W of Gold Beach, OR |
| MAP | 4.0 | 2010/05/14 19:10:24 | 42.264 | -126.670 | 10.0 | 186 km (116 mi) W of Gold Beach, OR |
| MAP | 3.0 | 2010/05/14 19:03:04 | 45.359 | -121.752 | 5.3 | 17 km ( 11 mi) E of Mount Hood Village, OR |
Oregon Experiences Quake Swarm
| MAP | 4.4 | 2010/05/07 20:02:19 | 44.496 | -129.418 | 10.0 | 423 km (263 mi) W of Yachats, OR |
| MAP | 4.3 | 2010/05/07 19:03:31 | 44.536 | -129.557 | 10.0 | 434 km (269 mi) W of Yachats, OR |
| MAP | 4.2 | 2010/05/07 18:51:00 | 44.490 | -129.557 | 10.0 | 433 km (269 mi) W of Yachats, OR |
| MAP | 3.9 | 2010/05/07 18:48:37 | 44.458 | -129.107 | 10.0 | 398 km (247 mi) W of Yachats, OR |
| MAP | 4.5 | 2010/05/07 18:43:08 | 44.456 | -129.410 | 10.0 | 422 km (262 mi) W of Yachats, OR |
| MAP | 4.4 | 2010/05/07 18:41:55 | 44.407 | -129.456 | 10.0 | 425 km (264 mi) W of Yachats, OR |
| MAP | 5.1 | 2010/05/07 17:46:15 | 44.396 | -129.437 | 10.0 | 424 km (263 mi) W of Yachats, OR |
Oregon’s Gasoline Tanks Vulnerable To Quakes
Everyday as I drive my Lincoln kids home, north on highway 30 toward the St. Johns Bridge, I wonder if those big tank structures near Linnton contain gasoline. An article in the May “NW Examiner” issue has a front page article that answers my question: “Oregon’s entire gasoline supply is stored in an earthquake danger zone in Northwest Portland.”
According to the article those tank farms sit right on the Portland Hills Fault. They are vulnerable In case of a major quake. Some of those storage tanks not only are 100 years old, but could not withstand a major quake. They are also built on soils that would liquify.
The primary risk is rupture in a quake resulting from movement in the Cascadia Subduction Zone that has the potential of up to a magnitude 9.0 earthquake. The Portland Hills Fault pictured above “is about 30 miles in length and runs north/south through the heart of downtown Portland to the north end of Forest Park.” It’s the second biggest risk because it runs directly underneath the tank farm and can generate magnitude 6.0 quakes.
Heck, there’s no absolutely safe place to live. Some have heat and humidity, hurricanes, tornados, bugs, illegal aliens, floods and a foot of rain in a day. We don’t have earthquakes very often, not like California. We just have scientists that warn us about our scary future.
Oregon, A Little Active?
map 1.9 2010/03/23 16:53:31 46.000N 123.138W 38.0 13 km ( 8 mi) SSE of Clatskanie, OR map 1.7 2010/03/23 15:40:24 45.540N 122.681W 16.6 4 km ( 2 mi) WNW of Portland, OR MAP 3.8 2010/03/22 01:11:48 41.850N 126.053W 10.0 148 km (92 mi) W of Brookings, OR map 2.8 2010/03/21 20:47:01 42.012N 125.603W 10.0 107 km (66 mi) WSW of Gold Beach, OR map 1.0 2010/03/20 18:49:00 45.104N 120.912W 27.5 15 km (10 mi) ESE of Maupin, OR
Previously unknown fault caused earthquake swarm off Oregon’s coast
Joe Rojas-Burke of The Oregonian has a story about that swarm of quakes back in March 140 miles off the coast from Newport, Oregon. He writes,
This swarm erupted in a steady stream as if emanating from a hot spot of rising magma from beneath the crust. “That’s normally what we see in volcanic and hydrothermally active regions at the edge of a plate,” said William Wilcock, a marine geophysicist and professor of oceanography at the University of Washington.
Late this month scientists reported the theory that N|W volcanoes may be linked. Here Wilcockx suggests “the findings fit with other emerging evidence that earthquakes and volcanic eruptions separated by hundreds of miles may be linked.”
