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Originally posted by jimmyx
c'mon, everyone knows that it isn't about how big the quake is, it's how many people die....everybody needs to get up to speed on this. you coiuld have a 9.0 in the middle of the pacific, but if nobody dies, it's just a blip on the news....but if 5.8 happens in topeka, kansas, with oh say 3 deaths...it'll be covered for an entire week.
Originally posted by Jerisa
I know these are not big by any means, but, thier location is highly unusual....
Residents in a small southwestern New Brunswick community may continue to feel minor earthquakes for several more days or even weeks, according to a Natural Resources Canada seismologist. McAdam has been hit with four small earthquakes since Saturday in what is known as an “earthquake swarm.” “Certainly we are seeing what we are calling an earthquake swarm,” said John Adams, a seismologist with Natural Resources Canada. “It is a number of earthquakes all of similar and small size all happening in the McAdam area.” The first earthquake happened at 1:40 a.m. on March 10, which had a magnitude of 2.4. Three minutes later, an aftershock with a magnitude of 1.4 was recorded. Two more earthquakes were recorded on Tuesday within roughly 20 minutes of each other. The small quakes had magnitudes of 2.0 and 1.9 respectively. Adams said these small earthquakes could happen for several more days or even weeks. “We are absolutely certain that they are earthquakes that are underground. They are unpredictable. Of course you don’t know when the next one is going to happen,” he said. Earthquake swarms often happen in Ontario and Canada’s North, Adams said, but do not pose risks. These minor quakes are still unsettling for many people who live in the area. Gloria Nason said her house hasn’t sustained any damage and the only noticeable effect was a picture falling from the wall. But she said the events are scary. “We had two very large bursts of something, they are just like great big bangs like an explosion, very eerie, very scary,” she said She said it felt like “a bunch of dynamite going off.” External Links Natural Resources Canada: Seismogram viewer in St. George
edit on 14-3-2012 by Jerisa because: unusual...
The Phuket quakes travelled through two faultlines - Ranong and Khlong Marui, which are on the hot list of 14 faultlines.
There were nine mild aftershocks yesterday following the quakes in Phuket on Monday, which damaged 35 homes on the island, said Nithas Phoowatthanakul, director-general of the Mineral Resources Depart-ment.
The aftershocks, measuring 2.1-2.7 on the Richter scale, were felt throughout the province although the twin quakes on Monday were strongest at Tambon Si Sunthorn in Thalang district. The final shock came at 12.18pm and was measured at 3.1, he said.
The first 4.3 quake struck Phuket at 4.44pm on Monday, followed two minutes later by the 5.7 quake.
"Both quakes were separate |phenomena, not that the second |was subsequent to the first," he added.
This event has been reviewed by a seismologist.
Thursday, April 19, 2012 at 19:09:17 UTC
Friday, April 20, 2012 at 05:09:17 AM at epicenter
0 km (~0 mile) (poorly constrained)
NEW SOUTH WALES, AUSTRALIA
54 km (34 miles) W (271°) from CANBERRA, Australia
287 km (179 miles) SW (236°) from Sydney, Australia
379 km (235 miles) SW (229°) from Lake Macquarie, Australia
horizontal +/- 42.4 km (26.3 miles); depth +/- 12.9 km (8.0 miles)
Nph= 0, Dmin=0 km, Rmss=0.98 sec, Gp= 0,
M-type=local magnitude (ML), Version=4
Magnitude: Geoscience Australia, Canberra, ACT, Australia
Location: Geoscience Australia, Canberra, ACT, Australia
Colorado's geologic history is as complex as it is fascinating. The geology is in turn inextricably entwined with Colorado's human history. That's true everywhere, of course, but it goes double here. Colorado's generous endowments of accessible mineral wealth and fertile farmland were not inevitable birthrights. Things could have turned out quite differently.
This overview ventures a "to the best of our knowledge" summary of Colorado geologic evolution current as of late 2004. Colorado's story still includes many gaps and controversies, often around events and structures shrouded in deep time, deep earth or both. I've attempted to point out the most significant unknowns and disagreements, but often, rightly or wrongly, I've simply taken sides.
If you take nothing else away from this humble attempt, please consider this: Of Colorado's 55 Fourteeners, all but 2 (Longs Peak and Pikes Peak) lie either along the Colorado Mineral Belt or on the shoulders of the Rio Grande Rift. Most of them cluster around the intersection of these two profound lineaments, both which almost certainly cut the full thickness of the lithosphere. This telling elevation distribution reflects a powerful synergy between truly ancient plate processes driven by the cooling of the earth in the presence of gravity and ongoing mantle processes driven by Lord knows what.
Originally posted by muzzy
I don't see any cycles for the 100 years
Yes more official recorders for sure, but data does go back to 314, its hard to know, just looking at Japan Historic Earthquakes (pdf) that goes back aways, the first entry is the year 679, no month or day, but has co-ords 33.5,130.5, a Mag 6.7,
then year 684/11/29 a mag 8.4 at 32.5,134. does this mean there were none in between?
many years have two events, and down to Mag 6.2, but you would think there would be more. Does this mean they missed recording them? or back in 684 there was just the one Mag 8.4 quake for all of Japan, I doubt it.
edit on 18-4-2012 by muzzy because: add link to pdf