Good Morning All;
I have been doing a whole lot of learning this morning...
Related Stories
Earthquake In Illinois Could Portend An Emerging Threat (Apr. 25, 2008) — To the surprise of many, the earthquake on April 18, 2008, about 120 miles east of St. Louis, originated in the Wabash Valley Fault, not the better-known and more-dreaded New Madrid Fault in ... > read more
Los Angeles Enjoying 1,000 Year Seismic Lull (Aug. 27, 2007) — The Los Angeles basin appears to be in a seismic "lull" characterized by relatively smaller and infrequent earthquakes, according to a study in the September issue of Geology. Study has implications ... > read more
Seismic Hazard: Stateline Fault System Is Major Component Of Eastern California Shear Zone (Nov. 6, 2007) — The 200-km (125 miles)-long Stateline fault system is a right-lateral strike-slip fault zone with clear Late Quaternary surface ruptures extending along the California-Nevada state line, from Primm, ... > read more
Illinois Earthquake Is A Wake-Up Call (Apr. 18, 2008) — Today's early morning earthquake that jolted many in the central U.S. is a reminder that seismic events do occur in areas not normally thought of as "earthquake country." It is also a lesson that ... > read more
New Liquefaction Hazard Maps Of Santa Clara Valley, Northern California (Feb. 2, 2009) — New hazard maps for Northern California delineate the probability of earthquake-induced liquefaction, based on three scenarios: A magnitude 7.8 on the San Andreas Fault comparable to the 1906 event, ... > read more
MORE Related Stories
Why Do Earthquakes Stop? (Feb. 6, 2008) — Why do some earthquakes terminate along a fault, while others jump or step-over a gap to another fault? The underlying structure of a fault determines whether an earthquake rupture will jump from one ... > read more
Magnitude 7.0 Earthquake Hits Haiti (Jan. 12, 2010) — The January 12, 2010, Haiti earthquake occurred in the boundary region separating the Caribbean plate and the North America plate. This plate boundary is dominated by left-lateral strike slip motion ... > read more
Loma Prieta Fault In California Stronger Than Previously Thought (Dec. 26, 2007) — A new study adds to evidence that the fault responsible for the 1989 Loma Prieta earthquake in the San Francisco Bay Area, California, is not as unusually weak as had been thought. In general, a ... > read more
Revised Understanding Of San Andreas Fault Geometry Near Desert Hot Springs (Aug. 18, 2009) — The Mission Creek and Banning faults are two principal strands of the San Andreas fault zone in the northern Coachella Valley of southern California. The two faults merge at depth to form one fault ... > read more
Seismic Hazard: Stateline Fault System Is Major Component Of Eastern California Shear Zone (Nov. 6, 2007) — The 200-km (125 miles)-long Stateline fault system is a right-lateral strike-slip fault zone with clear Late Quaternary surface ruptures extending along the California-Nevada state line, from Primm, ... > read more
Early Warning Systems Underestimate Magnitude Of Large Earthquakes (Jan. 29, 2009) — Scientists seek to create reliable early warning systems that accurately estimate the magnitude of an earthquake within the first seconds of rupture. Scientists looked at the idea that an ... > read more
New Madrid Fault System, U.S., May Be Shutting Down (Mar. 20, 2009) — The New Madrid fault system does not behave as earthquake hazard models assume and may be in the process of shutting down, a new study ... > read more
Earthquakes Actually Aftershocks Of 19th Century Quakes; Repercussions Of 1811 And 1812 New Madrid Quakes Continue To Be Felt (Nov. 5, 2009) — When small earthquakes shake the central US, citizens often fear the rumbles are signs a big earthquake is coming. Fortunately, a new study instead shows that most of these earthquakes are ... > read more
For a complete inventory of earthquake-related USGS publications, please see:
USGS earthquake-related research is also published in various Earth Science Journals.
Then this...
Repercussions Of 1811 And 1812 New Madrid Quakes Continue To Be Felt
*****
Some great sites for kids too.
Even in Wisconsin, I actually live along a very ancient fault line myself. It has been inactive for many many eons...
And even after all this reading, and most notably after that last link, I still have one nagging question...
How common is it to have these major aftershocks so many days later, as Haiti is experiencing still?
XOXO
Me
I'm not certain because I don't clearly understand half of this stuff. However, they were saying on the news, that these aftershocks can last up to 3-5 months. So I gather Haiti is in for a long ride before they end.
ReplyDelete
ReplyDeleteThank you for that information!
I appreciate knowing...
XOXO
me
My understanding coming from my kids living in Alaska where earthquakes are common and here in Arkansas where the fault line has been active this past year.. that aftershocks for several days is quite common. Even listening to the news when California has earthquakes they always discuss the after shocks that continue on some of which can be almost as destructive as the original shockwave.
ReplyDeleteScary, isn't it?
ReplyDeleteAnd many of our "doctors without borders" are already there.
XOXO
me
My parents live in the Wabash Valley were that Illinois earthquake was. We felt it all the way over here in the Miami Valley in Ohio.
ReplyDeleteEarthquakes are scary, plain and simple.
As for Haiti, they are in for a long ride not only because of after-shocks, but also because they never managed to recover from the four hurricanes that hit in 2008. Let's not forget, they government has no structure, therefore there is no systems in place for disaster recovery. It is also the poorest nation in the Americas, and one of the top poorest countries on earth.
Earthquakes may happen in groups aftershocks are a common occurrence even away from the epicenter they can happen up to 100 km length of a fault, subsequent earthquakes up to 100-200 km away from the mainshock are considered aftershocks
ReplyDeletedepends very heavily on the type of earthquake. There are several different kinds. Some slip sideways, up and down, if it has a long time since the last quake there tend to be a lots of aftershocks....
ReplyDeleteThe ones where several plates are moving in the same area, one quake tends to cause everything else to shift which means more aftershocks.
It certainly makes you aware of how precarious life can be. xxx
ReplyDeleteMy daughter living in Okinawa said they had a 5.3 earthquake a day or two after Haiti did. A 5.3 is more like a big person turning over in bed to some, but it did shake their house and made a few things fall to the floor. Okinawa is on that same "ring of fire" that follows the fault line for those frequent quakes. She has felt many of these minor quakes since being there.
ReplyDeleteAlso heard that Oklahoma experienced a small quake after Haiti did.
I imagine that when there is a "major movement" there will be ripple affects that move out in many directions. I know that doesn't sound very scientifically appropriate. Lets just say the earth is having "growing pains." And every stretch mark is what we call a fault line.