USGS List 2.4 2008/12/29 17:36:39 44.510N 110.384W 0.2 60 km (37 mi) ESE of West Yellowstone, MT 0.8 2008/12/29 14:25:44 44.526N 110.362W 1.4 61 km (38 mi) ESE of West Yellowstone, MT 2.4 2008/12/29 14:25:15 44.525N 110.360W 2.0 61 km (38 mi) ESE of West Yellowstone, MT 1.6 2008/12/29 14:18:51 44.521N 110.362W 2.2 61 km (38 mi) ESE of West Yellowstone, MT 1.8 2008/12/29 14:18:36 44.522N 110.359W 2.1 61 km (38 mi) ESE of West Yellowstone, MT 2.9 2008/12/29 13:38:25 44.514N 110.381W 2.1 60 km (37 mi) ESE of West Yellowstone, MT 2.3 2008/12/29 13:38:04 44.511N 110.385W 2.3 60 km (37 mi) ESE of West Yellowstone, MT 1.0 2008/12/29 13:26:29 44.520N 110.355W 2.2 62 km (38 mi) ESE of West Yellowstone, MT 1.9 2008/12/29 13:14:26 44.498N 110.364W 2.3 62 km (38 mi) ESE of West Yellowstone, MT 1.4 2008/12/29 13:13:31 44.508N 110.359W 2.2 62 km (38 mi) ESE of West Yellowstone, MT 0.9 2008/12/29 13:02:22 44.514N 110.380W 2.1 60 km (37 mi) ESE of West Yellowstone, MT 0.8 2008/12/29 13:02:10 44.497N 110.413W 2.9 58 km (36 mi) ESE of West Yellowstone, MT 2.2 2008/12/29 12:56:46 44.522N 110.365W 1.2 61 km (38 mi) ESE of West Yellowstone, MT 1.2 2008/12/29 12:53:50 44.511N 110.377W 2.2 60 km (37 mi) ESE of West Yellowstone, MT 1.1 2008/12/29 12:46:13 44.515N 110.386W 2.4 59 km (37 mi) ESE of West Yellowstone, MT 0.7 2008/12/29 12:45:10 44.547N 110.362W 1.0 60 km (37 mi) ESE of West Yellowstone, MT 1.7 2008/12/29 12:44:50 44.525N 110.373W 0.0 60 km (37 mi) ESE of West Yellowstone, MT 1.7 2008/12/29 12:40:27 44.511N 110.379W 2.5 60 km (37 mi) ESE of West Yellowstone, MT 2.4 2008/12/29 12:37:07 44.502N 110.366W 1.8 61 km (38 mi) ESE of West Yellowstone, MT 1.2 2008/12/29 12:36:08 44.521N 110.385W 2.0 59 km (37 mi) ESE of West Yellowstone, MT 1.7 2008/12/29 12:35:27 44.511N 110.385W 2.4 59 km (37 mi) ESE of West Yellowstone, MT 2.9 2008/12/29 12:29:38 44.513N 110.381W 0.5 60 km (37 mi) ESE of West Yellowstone, MT 2.5 2008/12/29 12:28:55 44.515N 110.381W 0.0 60 km (37 mi) ESE of West Yellowstone, MT 1.8 2008/12/29 12:26:21 44.519N 110.370W 2.0 60 km (38 mi) ESE of West Yellowstone, MT 1.5 2008/12/29 12:24:43 44.520N 110.342W 2.3 63 km (39 mi) ESE of West Yellowstone, MT 3.3 2008/12/29 12:14:49 44.521N 110.369W 1.8 60 km (38 mi) ESE of West Yellowstone, MT 1.2 2008/12/29 11:47:45 44.523N 110.371W 2.1 60 km (37 mi) ESE of West Yellowstone, MT 1.4 2008/12/29 11:40:00 44.533N 110.359W 4.8 61 km (38 mi) ESE of West Yellowstone, MT 1.1 2008/12/29 09:32:12 44.494N 110.360W 2.4 62 km (39 mi) ESE of West Yellowstone, MT 1.6 2008/12/29 09:31:55 44.491N 110.360W 2.3 62 km (39 mi) ESE of West Yellowstone, MT 1.2 2008/12/29 09:15:28 44.480N 110.363W 2.3 62 km (39 mi) ESE of West Yellowstone, MT 1.5 2008/12/29 07:58:37 44.486N 110.354W 1.3 63 km (39 mi) ESE of West Yellowstone, MT 1.7 2008/12/29 03:25:18 44.523N 110.371W 2.4 60 km (37 mi) ESE of West Yellowstone, MT 1.8 2008/12/29 02:14:04 44.527N 110.376W 0.3 60 km (37 mi) ESE of West Yellowstone, MT 2.4 2008/12/29 01:57:55 44.527N 110.378W 0.5 60 km (37 mi) ESE of West Yellowstone, MT 2.4 2008/12/29 01:28:24 44.527N 110.382W 0.4 59 km (37 mi) ESE of West Yellowstone, MT 2.0 2008/12/28 22:30:35 44.517N 110.372W 1.0 60 km (37 mi) ESE of West Yellowstone, MT 2.3 2008/12/28 22:30:04 44.477N 110.349W 6.5 63 km (39 mi) ESE of West Yellowstone, MT 1.7 2008/12/28 22:29:23 44.489N 110.354W 4.2 63 km (39 mi) ESE of West Yellowstone, MT 2.4 2008/12/28 22:23:36 44.516N 110.361W 6.4 61 km (38 mi) ESE of West Yellowstone, MT 1.9 2008/12/28 21:29:18 44.522N 110.385W 1.0 59 km (37 mi) ESE of West Yellowstone, MT 2.8 2008/12/28 21:25:53 44.514N 110.370W 0.1 61 km (38 mi) ESE of West Yellowstone, MT 2.6 2008/12/28 16:57:56 44.521N 110.371W 1.4 60 km (37 mi) ESE of West Yellowstone, MT 2.0 2008/12/28 16:08:25 44.491N 110.390W 1.7 60 km (37 mi) ESE of West Yellowstone, MT 3.1 2008/12/28 12:55:17 44.511N 110.353W 0.7 62 km (38 mi) ESE of West Yellowstone, MT 3.0 2008/12/28 12:32:15 44.511N 110.356W 2.7 62 km (38 mi) ESE of West Yellowstone, MT 0.8 2008/12/28 08:38:51 44.492N 110.364W 2.5 62 km (38 mi) ESE of West Yellowstone, MT 2.8 2008/12/28 08:37:40 44.514N 110.359W 0.0 61 km (38 mi) ESE of West Yellowstone, MT 2.2 2008/12/28 02:25:14 44.508N 110.364W 1.9 61 km (38 mi) ESE of West Yellowstone, MT 3.2 2008/12/28 02:23:57 44.511N 110.361W 0.4 61 km (38 mi) ESE of West Yellowstone, MT 1.9 2008/12/28 00:16:13 44.513N 110.374W 2.0 60 km (37 mi) ESE of West Yellowstone, MT 2.5 2008/12/28 00:15:18 44.495N 110.359W 0.0 62 km (39 mi) ESE of West Yellowstone, MT 2.5 2008/12/27 23:37:41 44.492N 110.356W 2.6 62 km (39 mi) ESE of West Yellowstone, MT 2.0 2008/12/27 23:37:20 44.497N 110.379W 2.1 60 km (38 mi) ESE of West Yellowstone, MT 1.9 2008/12/27 22:28:49 44.498N 110.383W 2.3 60 km (37 mi) ESE of West Yellowstone, MT 1.9 2008/12/27 22:28:05 44.485N 110.371W 2.5 61 km (38 mi) ESE of West Yellowstone, MT 1.8 2008/12/27 22:26:14 44.484N 110.359W 2.0 62 km (39 mi) ESE of West Yellowstone, MT 1.2 2008/12/27 22:26:03 44.470N 110.355W 5.2 63 km (39 mi) ESE of West Yellowstone, MT 1.3 2008/12/27 22:24:39 44.489N 110.359W 4.1 62 km (39 mi) ESE of West Yellowstone, MT 2.8 2008/12/27 22:23:54 44.489N 110.354W 2.5 63 km (39 mi) ESE of West Yellowstone, MT 1.9 2008/12/27 22:21:16 44.480N 110.344W 4.0 64 km (40 mi) ESE of West Yellowstone, MT 1.7 2008/12/27 22:20:10 44.494N 110.379W 2.4 61 km (38 mi) ESE of West Yellowstone, MT 1.6 2008/12/27 22:19:11 44.492N 110.372W 2.2 61 km (38 mi) ESE of West Yellowstone, MT 3.9 2008/12/27 22:15:56 44.502N 110.366W 0.3 61 km (38 mi) ESE of West Yellowstone, MT 2.6 2008/12/27 17:08:50 44.493N 110.354W 0.4 62 km (39 mi) ESE of West Yellowstone, MT 3.3 2008/12/27 15:30:03 44.498N 110.358W 4.3 62 km (39 mi) ESE of West Yellowstone, MT 1.5 2008/12/27 15:28:53 44.500N 110.368W 2.1 61 km (38 mi) ESE of West Yellowstone, MT 1.8 2008/12/27 15:27:36 44.499N 110.367W 2.5 61 km (38 mi) ESE of West Yellowstone, MT 1.0 2008/12/27 14:28:06 44.500N 110.362W 3.5 62 km (38 mi) ESE of West Yellowstone, MT 0.9 2008/12/27 14:27:41 44.498N 110.364W 2.4 62 km (38 mi) ESE of West Yellowstone, MT 1.6 2008/12/27 14:22:08 44.495N 110.372W 2.6 61 km (38 mi) ESE of West Yellowstone, MT 2.1 2008/12/27 14:08:49 44.496N 110.370W 2.0 61 km (38 mi) ESE of West Yellowstone, MT 3.2 2008/12/27 13:26:27 44.505N 110.364W 2.4 61 km (38 mi) ESE of West Yellowstone, MT 3.5 2008/12/27 13:17:33 44.488N 110.357W 4.1 62 km (39 mi) ESE of West Yellowstone, MT 2.3 2008/12/27 11:56:35 44.484N 110.367W 0.5 62 km (38 mi) ESE of West Yellowstone, MT 3.0 2008/12/27 11:23:07 44.495N 110.364W 2.8 62 km (38 mi) ESE of West Yellowstone, MT 2.0 2008/12/27 11:21:36 44.493N 110.362W 7.2 62 km (38 mi) ESE of West Yellowstone, MT 1.2 2008/12/27 10:01:46 44.484N 110.373W 2.4 61 km (38 mi) ESE of West Yellowstone, MT 2.7 2008/12/27 10:01:07 44.490N 110.366W 1.2 62 km (38 mi) ESE of West Yellowstone, MT 2.6 2008/12/27 09:30:54 44.498N 110.362W 2.5 62 km (38 mi) ESE of West Yellowstone, MT
December 29, 2008
AP
CHEYENNE, Wyo. — Yellowstone National Park was jostled by a host of small earthquakes for a third straight day Monday, and scientists watched closely to see whether the more than 250 tremors were a sign of something bigger to come.
Swarms of small earthquakes happen frequently in Yellowstone, but it's very unusual for so many earthquakes to happen over several days, said Robert Smith, a professor of geophysics at the University of Utah.
"They're certainly not normal," Smith said. "We haven't had earthquakes in this energy or extent in many years."
HOLLY NOTE: As a reminder, though USGS maps label an event "Last Day", it may be as recent as 1 hour + 1 minute ago. Events designated as "Last Week" may have occurred as recently as 61 minutes ago. This "lump sum" dating often gives an inaccurate picture of the exact time earthquakes strike - always pushing the date back.
Also of curious interest... I repeatedly hit the Refresh button on my browser while on this quake map page, as the earthquake notices flooded my mailbox. I expected to see the map dotted with red, showing quakes within the last hour. No matter how closely together I refreshed that USGS page, the red boxes quit appearing though the event count embedded on the map kept increasing. I started monitoring them at 42. Now, it shows 81 events, but they all appear to have hit "yesterday" or "last week" — except one. (Now don't you feel better these events are safely behind you?)
Article continues:
Smith directs the Yellowstone Seismic Network, which operates seismic stations around the park. He said the quakes have ranged in strength from barely detectable to one of magnitude 3.8 that happened Saturday. A magnitude 4 quake is capable of producing moderate damage.
"This is an active volcanic and tectonic area, and these are the kinds of things we have to pay attention to," Smith said. "We might be seeing something precursory.
"Could it develop into a bigger fault or something related to hydrothermal activity? We don't know. That's what we're there to do, to monitor it for public safety."
The strongest of dozens of tremors Monday was a magnitude 3.3 quake shortly after noon. All the quakes were centered beneath the northwest end of Yellowstone Lake.
A park ranger based at the north end of the lake reported feeling nine quakes over a 24-hour period over the weekend, according to park spokeswoman Stacy Vallie. No damage was reported.
"There doesn't seem to be anything to be alarmed about," Vallie said.
Smith said it's difficult to say what might be causing the tremors. He pointed out that Yellowstone is the caldera of a volcano that last erupted 70,000 years ago.
He said Yellowstone remains very geologically active — and its famous geysers and hot springs are a reminder that a pool of magma still exists five to 10 miles underground.
"That's just the surface manifestation of the enormous amount of heat that's being released through the system," he said.
Yellowstone has had significant earthquakes as well as minor ones in recent decades. In 1959, a magnitude 7.5 quake near Hebgen Lake just west of the park triggered a landslide that killed 28 people.
http://www.foxnews.com/story/0,2933,473925,00.html
2.4 2008/12/30 04:59:07 44.523N 110.401W 0.3 58 km (36 mi) ESE of West Yellowstone, MT