EARTHQUAKES!

[minganocaptain of 1,000]

What''s going on in central Utah?

http://earthquake.usgs.gov/earthquakes/ ... 009678.php

A seismically active region is being seismically active.

[AGalagaChiasmuscaptain of 100]

What''s going on in central Utah?

http://earthquake.usgs.gov/earthquakes/ ... 009678.php

A seismically active region is being seismically active.

Quite the charmer there.

[minganocaptain of 1,000]

Quite the charmer there.

Sarcasm logged.

I follow earthquakes. And storms. And volcanoes. And epidemics. There are enough real things to worry about so inducing concern over something that does not merit concern is cause for concern. The whackadoodles over at ATS and GLP are less credible than any tabloid with their declarations that forest fires and dust storms are "volcanic plumes" that the government is covering up.

Wake me up when you start seeing harmonic tremors in Seattle or if there is a 500% increase in the number of lost pets in St Louis. Right now the most interesting seismic events in the world is a rift zone in Iceland that seems to be waking up and sister Katla possibly coming out of winter stasis.

Steam blasts in Death Valley or Yellowstone could happen at any moment, without warning - also cause for concern but not much.

[buffalo_girlcaptain of 1,000]

Wake me up when you start seeing harmonic tremors in Seattle or if there is a 500% increase in the number of lost pets in St Louis. Right now the most interesting seismic events in the world is a rift zone in Iceland that seems to be waking up and sister Katla possibly coming out of winter stasis.

Steam blasts in Death Valley or Yellowstone could happen at any moment, without warning - also cause for concern but not much.mingano

Oooo, why wake you up at all?

[minganocaptain of 1,000]

Sorry... thought this was a serious discussion about seismic/tectonic activity. I'll stop following the thread now.

[AGalagaChiasmuscaptain of 100]

Sorry... thought this was a serious discussion about seismic/tectonic activity. I'll stop following the thread now.

No... This is an alarmist hang-wringing thread about earthquakes and possible symbolic meaning... This isn't the thread you are looking for. Move along.

[DrJonescaptain of 1,000]

I like to report the facts; and some facts are indeed intriguing despite the naysayers!
The 187/188-day pattern as delineated above did indeed maintain with another data-point, as noted.

Sand fountains are an interesting phenomenon, a bit mysterious IMO:

http://www.youtube.com/watch?v=PWdVxggS ... r_embedded
shows a large sand fountain in Saudi Arabia.

Re: the New Madrid fault near Paducah KY; where the levee was breached using explosives last year.

Mayor orders evacuation at New Madrid Earthquake zone/Sand Fountains
http://www.msnbc.msn.com/id/42836171

Mayor orders flood-threatened Ill. city evacuated

By DAVID MERCER
The Associated Press
updated 4/30/2011 11:57:59 PM ET 2011-05-01T03:57:59


CHAMPAIGN, Ill. — The mayor of a small southern Illinois city threatened by two swollen rivers ordered all residents to leave by midnight Saturday because a "sand boil," an area where river water was seeping up through the ground behind the levee, had become dangerously large.
Cairo Mayor Judson Childs issued a mandatory evacuation order for the city of 2,800 residents late Saturday afternoon hours after meeting with Maj. Gen. Michael Walsh, the Army Corps of Engineers officer tasked with deciding whether to blow a hole in the Birds Point levee in Missouri, downstream from Cairo, to relieve pressure on levees along the dangerously high Ohio and Mississippi rivers.


Walsh, who toured Cairo's levee area, described the boil that has been growing since it was first spotted Tuesday as the largest he had ever seen, the Southeast Missourian newspaper reported.
Sand boils occur when high-pressure water pushes under flood walls and levees and wells up through the soil behind them. They're a potential sign of trouble.
City clerk Lorrie Hesselrode described the boil as "kind of like Old Faithful," the famous geyser in Yellowstone National Park in Wyoming. "There's so much water pressure it forces the water under ground."


"It's kind of scary. It's pretty big. We've had sand boils before but nothing like this. It is under control but other boils have popped up," she told The Associated Press.
Childs said in a news release that the boil had been stabilized and that officials would continue to monitor it closely.


The river is expected to crest in Cairo at 60.5 feet — a foot above the local record high — by Tuesday morning and stay there through at least Thursday afternoon, according to the National Weather Service. A flood wall protects Cairo up to 64 feet, but the corps fears that water pressure from the lingering river crest could compromise the wall and earthen levees that protect other parts of the city.


Rain was expected to fall in the area Saturday night, and authorities had been urging residents to leave Cairo before the mandatory order was issued. Earlier Saturday, Cairo police Chief Gary Hankins estimated that about 1,000 residents remained.
Childs urged residents to remain calm and to let police know they're leaving.
"Please do not panic and exit the city in a timely manner by midnight," Childs said.
The corps inched closer Saturday to blowing a hole in the Birds Point levee after a federal appeals court declined to stop the move.


The corps moved a pair of barges loaded with the makings of an explosive sludge into position near levee, which is on the Mississippi River just downstream from Cairo in Missouri, but said it hadn't decided that it needed to breach the 60-foot-high earthen wall to protect Cairo.
The 230 people who live in the southeast Missouri flood plain behind the Birds Point levee had already been evacuated from their homes, a spokesman for Missouri Gov. Jay Nixon said. Some of the farmers whose roughly 130,000 acres of land would be inundated moved out what they could Saturday, assuming the corps will have no choice as the Mississippi and Ohio that feeds it rise.
"When the water hits this dirt, it's going to make a hell of a mess," one of the farmers, Ed Marshall, said as he packed up his farm office and hauled away propane tanks and other equipment. He said he was keeping an eye on the weather forecast, which called for several more inches of rain over the next few days. "If that happens, I don't believe they'll be able to hold it."
In Cairo, the mayor said he was relieved by the 8th U.S. Circuit Court of Appeals' decision early Saturday in St. Louis.


"I've been saying all along that we can't take land over lives," Childs said.
The state of Missouri had asked the court to block the plan because to protect the farm land. Scott Holste, a spokesman for Missouri Gov. Jay Nixon, said state officials there are now focused on protecting the homes, agricultural equipment and other property left behind in the heavily farmed flood plain below the levee. In addition to people evacuated from the floodway, as many as 800 were asked to leave surrounding areas.


"The entire area has been evacuated now," Holste said, adding that more than 500 Missouri National Guard troops are helping local law enforcement at checkpoints around the area.
It's unclear whether Missouri could pursue further legal action. Holste referred questions to Attorney General Chris Koster, whose didn't respond to phone calls or emails Saturday from The Associated Press.


The corps started moving the barges to a spot in Kentucky just across from the levee Saturday afternoon but was still weighing its options and monitoring the rise of the Ohio River in Cairo, which is just north of where the Ohio flows into the Mississippi, spokesman Jim Pogue said. The decision would be based on how high the river is expected to get, from new rain that could fall and water backing up in reservoirs upstream.


One key signal, he said, will be if the Ohio nears or reaches 61 feet at Cairo.
About 80 miles northeast in Old Shawneeville, Ill., local residents were looking for volunteer help to fill sand bags to help contain leaks and seeps at the town's levee, Saline County sheriff's Lt. Tracey Felty said. With the Ohio River at just under 53 feet and not expected to rise above 54.5 when it crests Tuesday, the 60-foot-tall levee should be topped, he said.
But in some small area communities, a few homes have flooded, forcing their owners into a local shelter. Other buildings are swamped, too.


"It just flooded the church," in Junction, he said, noting one example. "They just couldn't keep up with the sandbags."
___
Associated Press writer Bill Draper in Kansas City, Mo., and Jim Salter in St. Louis contributed to this report.

[minganocaptain of 1,000]

Sand boils have nothing in common with sand fountains.

[DrJonescaptain of 1,000]

Sand boils have nothing in common with sand fountains.

So -- what causes sand fountains? (as seen in Saudi Arabia) I always like to learn something new!

[minganocaptain of 1,000]

During an earthquake you can have a sand blown where a pocket of sand spews to the surface. The "sand fountain" in Saudi Arabia may have been a pocket of gas or a broken pipeline that was spewing, and some people identified that video as muddy/sandy water rather than sand (citing the lack of a pile forming).

Sand boils are just pockets of sand that are being pushed along by water. Lots of videos available.

[DrJonescaptain of 1,000]

M=8.6 today; hopefully did catastrophic to people in the region:

Jakarta, Indonesia (CNN) -- A massive earthquake struck off the coast of the Indonesian island of Sumatra on Wednesday afternoon, triggering a tsunami alert for the Indian Ocean.

The quake struck about 434 kilometers (270 miles) southwest of Banda Aceh, the capital of Indonesia's Aceh province, and had a magnitude of 8.6, the U.S. Geological Survey said. It took place at a depth of 23 kilometers (14 miles).

The tremor revived fearful memories of the catastrophic earthquake and tsunami in the region in 2004 that killed tens of thousands of people.

The Pacific Tsunami Warning Center said Wednesday that it had issued a tsunami watch for the entire Indian Ocean, and the Indonesian Meteorology, Climatology and Geophysics Agency said it had put up a tsunami warning.

The Indonesian president, Susilo Bambang Yudhoyono, said on local television that there were no reports of casualties or damage in Aceh so far.

The areas most at risk of a tsunami are coastal areas of Aceh, particularly the island of Simeulue, Prih Harjadi, an official for the Indonesian geophysics agency said on Metro TV.

The earthquake appears to have involved a horizontal movement rather than a vertical movement, so it is less likely that it will generate a tsunami, said Gary Gibson from the Seismology Research Center in Melbourne, Australia.

He also said that the tremor took place a long way offshore and was therefore unlikely to have caused much damage itself.

The power has gone out in Banda Aceh and residents are moving to higher ground, said Sutopo Purwo Nugroho, a spokesman for the Indonesian National Disaster Management Agency.

The authorities in India's Andaman and Nicobar Islands have ordered people to move out of low-lying areas.

The region's chief secretary, Shakti Sinha, said that there are "a few hundred people" in the areas where the evacuation order had been issued.

In 2004, a 9.1-magnitude underwater earthquake struck off the coast of Sumatra, triggering a tsunami that killed more than 200,000 people in 14 countries. The majority of the deaths were in Indonesia, with Aceh bearing the brunt.

That quake took place 250 kilometers (155 miles) south-southeast of Banda Aceh at a depth of 30 kilometers (19 miles).

The tsunami, which washed away entire communities, caused nearly $10 billion in damage and more casualties than any other tsunami in history, according to the United Nations.

Indonesia is on the so-called Ring of Fire, an arc of fault lines circling the Pacific Basin that is prone to frequent earthquakes and volcanic eruptions.

The earthquake Wednesday comes just over year after a magnitude 9 quake off the northeast coast of Japan caused a devastating tsunami. The death toll from that disaster stands at about 15,850.

[minganocaptain of 1,000]

M=8.6 today; hopefully did catastrophic to people in the region

Hopefully DID do catastrophic damage to the occupants?

[gkearneycaptain of 100]

M=8.6 today; hopefully did catastrophic to people in the region:

I hope you didn't mean what you wrote.

[AGalagaChiasmuscaptain of 100]

M=8.6 today; hopefully did catastrophic to people in the region:

Well, those people in the region deserve it. Earthquakes have rights too!

[lost arkcaptain of 100]

M=8.6 today; hopefully did catastrophic to people in the region:

I hope you didn't mean what you wrote.

Of course he didn't mean it. Most of us have fingers that go rogue once in a while and type something entirely different from what we were thinking. Dr. Jones has been nothing but kind to people on this forum and has worked to improve lives of those in third world countries with his projects.

[bobhenstracaptain of 1,000]

7.0 Mw - MICHOACAN, MEXICO

Preliminary Earthquake Report
Magnitude 7.0 Mw
Date-Time
11 Apr 2012 22:55:16 UTC
11 Apr 2012 17:55:16 near epicenter
11 Apr 2012 15:55:16 standard time in your timezone
Location 18.390N 102.652W
Depth 65 km
Distances
51 km (32 miles) SW (231 degrees) of La Mira, Michoacán, Mexico
61 km (38 miles) NW (312 degrees) of Las Guacamayas, Michoacán, Mexico
64 km (40 miles) NW (316 degrees) of La Orilla, Michoacán, Mexico
130 km (81 miles) SSW (208 degrees) of Uruapan, Michoacán, Mexico
336 km (209 miles) WNW (301 degrees) of Acapulco, Guerrero, Mexico
Location Uncertainty Horizontal: 16.7 km; Vertical 12.0 km
Parameters Nph = 404; Dmin = 210.4 km; Rmss = 0.87 seconds; Gp = 72°
M-type = Mw; Version = A
Event ID US c00090z0
For updates, maps, and technical information, see:
Event Page
or
USGS Earthquake Hazards Program

National Earthquake Information Center
U.S. Geological Survey
http://neic.usgs.gov/

[LateOutOfBedcaptain of 100]

Busy day.. also a 5.9 off of the coast of Oregon.

[karen2cruisecaptain of 100]

Busy day on the Pacific ring of fire. For some reason Johnny Cash's song Ring of Fire is now stuck in my head

I fell into a burnin' ring of fire
I went down, down, down
And the flames went higher,
And it burns, burn, burns,
The ring of fire, the ring of fire.

[believercaptain of 100]

KSL news reported Earthquake near Panguitch, Utah:

TROPIC, Garfiled County — A moderate earthquake rattled the Bryce Valley area in Garfield County Wednesday night.

The 4.3 magnitude quake hit at about 9:30 p.m. and was centered roughly 13 miles north of the town of Tropic.

[believercaptain of 100]

Another EQ in Mexico in the Baja.

http://www.foxnews.com/world/2012/04/12 ... st-mexico/


Strong earthquake strikes off the coast of Mexico
Published April 12, 2012
Associated Press

USGS
A strong earthquake struck off the coast of Mexico on Thursday, waking up residents living near the Gulf of California, only hours after a separate temblor swayed tall buildings in Mexico City, causing evacuations.
Authorities said neither quake left major damage nor victims.
The U.S. Geological Survey reported a 6.9 magnitude quake hit the waters between the Baja peninsula and the northern state of Sonora at 12:15 a.m. local time.
Residents in the city of Hermosillo woke up as their beds swayed and their ceiling fans shook. Luis Enrique Cordova, director of emergency services in Sonora, said confused residents clogged the phone lines of the civil protection office in Hermosillo, the largest city and capital of the state, where some 700,000 people live. But Cordova said no major damages have been detected in the region.
"I was on my bed, leaning against the wall, and the fans kept moving non-stop, side to side," said Carlos Morales, a teacher in Hermosillo.
The temblor was centered 82 miles northeast of Guerrero Negro, and 133 miles west of Hermosillo, and it hit some 6.4 miles below the surface.
It follows a 6.4 magnitude quake which struck a sparsely populated area in the mountains of western Mexico on Wednesday, and caused multi-story buildings to sway more than 200 miles away in Mexico City.
Wednesday's temblor was the latest in a series of strong shakes to hit Mexico City since a powerful 7.4-magnitude quake hit southern Mexico three weeks ago. But this was not an aftershock of that one, USGS geophysicist Dale Grant said.
Last month's big earthquake was felt strongly in the nation's capital, and it damaged hundreds of homes and killed at least two people near the border between Guerrero and Oaxaca states. Mexico's seismological service said that quake has been followed by close to 400 aftershocks, including one of magnitude 6.0.


Read more: http://www.foxnews.com/world/2012/04/12 ... z1rovVKCOv

[AGalagaChiasmuscaptain of 100]

Scientists are beginning to believe that the sub-hertz peak ground accelerations can travel through the mantle and trigger off earthquakes just about anywhere in the world. The M8.8 in Indonesia could be responsible for this.

4-12-2012_NA_EQ.jpg (67.1 KiB) Viewed 1010 times

[DrJonescaptain of 1,000]

Yes, good point A...Chiasmus.
From the map above, note the LARGE quakes along the extensions of the San Andreas fault...

[sbsioncaptain of 1,000]

so, if we get out our horns, blow them, and circle seven times, we can pull off an earthquake anywhere?

[minganocaptain of 1,000]

San Andreas is a threat, but remember - California claims only three of the 20 most powerful earthquakes in the US, and doesn't appear on the list until #13 with the Fort Tejon quake of 1857. Excluding Alaska and Hawaii, the 15 strongest US quakes see 7 being in California, with the others shaking Oregon/Washington coast, Missouri, Montana and South Carolina.

While California is inevitably going to get a big one they are mostly prepared with some decent seismic codes. In terms of disruption I fear a large quake in Missouri most (the New Madrid quakes are responsible for the "heel" that you can see on the US maps today) because I just don't think that St Louis is ready. A quake in California is bad and might shut down one port for awhile. A quake in the Midwest can shut down the Mississippi and/or Missouri rivers for months. Do you realize how much of a disruption that is on commerce? And if a bridge or two fail cutting off East/West travel.... how quickly could they get the trains running again?

[Gyrlgeekcaptain of 100]

It was very interesting today. I have my phone set up to notify me if there is a 2.0 or above earthquake in the eastern/midwestern part of the US. I received a notification for a 3.4 earthquake in Oklahoma today, but when I look at usgs or Global Earthquake map, it is not there.

Any one else notice that?

Curiouser and curiouser.

[bobhenstracaptain of 1,000]

Scientists are beginning to believe that the sub-hertz peak ground accelerations can travel through the mantle and trigger off earthquakes just about anywhere in the world. The M8.8 in Indonesia could be responsible for this.

At what frequency does any wave form become "sub Hertz?"

Bob

[jonesdecaptain of 1,000]

Scientists are beginning to believe that the sub-hertz peak ground accelerations can travel through the mantle and trigger off earthquakes just about anywhere in the world. The M8.8 in Indonesia could be responsible for this.

At what frequency does any wave form become "sub Hertz?"

Bob

My guess would be anything less than one cycle per second (ie less than one hertz). That makes for a VERY long wavelength, and I guess what AGC is saying is that such waves when large can travel well throughout the earth.

I've heard that interference between higher frequency waves can produce these same sorts of waves. I think DrJones was doing some research on that at one point.

[bobhenstracaptain of 1,000]

Scientists are beginning to believe that the sub-hertz peak ground accelerations can travel through the mantle and trigger off earthquakes just about anywhere in the world. The M8.8 in Indonesia could be responsible for this.

At what frequency does any wave form become "sub Hertz?"

Bob

My guess would be anything less than one cycle per second (ie less than one hertz). That makes for a VERY long wavelength, and I guess what AGC is saying is that such waves when large can travel well throughout the earth.

I've heard that interference between higher frequency waves can produce these same sorts of waves. I think DrJones was doing some research on that at one point.

It would seem to my scientific uneducated mind that anything less than one cycle per second is zero cycles per second! I am not understanding how there could possible be a negative factor in cycles per second, or even a percentage of less than one cycle per second, which seems to me to necessary be diminished in power. Perhaps the "power" of less than one cycle per second to no cycles per second is strengthened, however when there are no cycles per second???

Negative factors happen in math, do they also happen in earthquake waves? And how would you measure that?

Steve, any other scientist here, what say ye?

Bob

[jonesdecaptain of 1,000]

It would seem to my scientific uneducated mind that anything less than one cycle per second is zero cycles per second! I am not understanding how there could possible be a negative factor in cycles per second, or even a percentage of less than one cycle per second, which seems to me to necessary be diminished in power. Perhaps the "power" of less than one cycle per second to no cycles per second is strengthened, however when there are no cycles per second???

Negative factors happen in math, do they also happen in earthquake waves? And how would you measure that?

Steve, any other scientist here, what say ye?

Bob

A frequency can't go negative, but can be less than one. The cycle time for a wave is just the time between one peak and another. If that time between two peaks of the wave is greater than one second, then the frequency (which is 1 divided by the time in seconds between peaks) will by less than one.

For example, power grid electricity in the USA oscillates at 60 hertz, which means the time between wave peaks is 1/60th of one second. That's a pretty small time between peaks. If the time was really long between peaks, like say 10 seconds, then the frequency of the wave would 1/10th or 0.10 hertz.

For earthquakes the peak is when the motion stops doing in one direction and reverses. It's usually vertical or horizontal, so the peak is when the vertical motion is all the way up (or down) or when the horizontal motion is all the way north (or whatever other direction) and then reverses. Of course, earthquakes are complex and don't just have a single vector of motion or a constant frequency, they move all over the place and the frequency of the motion varies.

[bobhenstracaptain of 1,000]

So, where is the strength in EQ shock waves of less than one hertz? How does a frequency of less than one hertz "signal?" earthquakes in distance areas as the map above supposedly shows? It would seem to me that if the supposition is true that frequencies of a percentage of less than one would have to have a big increase in power to effect areas of the distance shown on the map, and I don't see how that is possible!

I guess that I'm have trouble understanding how an EQ frequency of .50 hertz, or a sub hertz frequency, is more powerful than frequencies at 1 or above (one) hertz! Radio frequencies are not applicable here. As I understand it earthquake S and P waves are shock waves. On a seismograph when S and P waves flat line, there are no more waves, so how do weakened "sub hertz" waves trigger earthquakes at the distances claimed in the map above?

Bob