Earthquake! (or maybe Volcano!)

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Addie
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Re: Earthquake!

#276

Post by Addie »

VOA News
Death Toll from Mexico Quake Rises to 90

The death toll from the massive earthquake that rocked southern Mexico has risen to at least 90, with most of the fatalities occurring in Oaxaca State.

The powerful 8.2-magnitude quake struck off Mexico’s far southern Pacific coast just before midnight Thursday, about 100 kilometers from the town of Tonala.

The earthquake triggered a 1-meter-high tsunami, according to the Pacific Tsunami Warning Center, but there were no reports of tsunami damage. ...

Mexican President Enrique Pena Nieto has said the earthquake was bigger than a 1985 earthquake in the country that killed thousands. In a televised address Friday evening, he declared three days of national mourning and promised that the government will help rebuild.
Adding:
BBC News: Mexico earthquake: Death toll rises to 90 ...

Hundreds of families have reportedly been camping in the streets, afraid of the dangers of aftershocks. The Mexican Seismological Service said 721 had been recorded since the initial tremor.
"The very least you can do in your life is to figure out what you hope for." - Barbara Kingsolver

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Re: Earthquake!

#277

Post by Volkonski »

Scientists locate potential magma source in Italian supervolcano

https://phys.org/news/2017-09-scientist ... alian.html
Campi Flegrei is a volcanic caldera to the west of Naples that last erupted centuries ago.

The area has been relatively quiet since the 1980s when the injection of either magma or fluids in the shallower structure of the volcano caused a series of small earthquakes.

Using seismological techniques, scientists have now pinpointed the location of the hot zone where hot materials rose to feed the caldera during this period.

:snippity:

"One question that has puzzled scientists is where magma is located beneath the caldera, and our study provides the first evidence of a hot zone under the city of Pozzuoli that extends into the sea at a depth of 4 km," Dr De Siena said.
Campi Flegrei is about 17 miles west of Vesuvius. The city of Naples lies between them.

Campi Flegrei volcano eruption possibly closer than thought

https://phys.org/news/2017-05-campi-fle ... sibly.html
The Campi Flegrei volcano in southern Italy may be closer to an eruption than previously thought, according to new research by UCL and the Vesuvius Observatory in Naples.

The volcano has been restless for 67 years, with two-year periods of unrest in the 1950s, 1970s and 1980s causing small, local earthquakes and ground uplift. Similar unrest occurred over 500 years ago, when it took a century to build up to an eruption in 1538.

The authors of the study, published today in Nature Communications, used a new model of volcano fracturing developed at UCL to investigate whether Campi Flegrei may again be preparing to erupt.

They found that the unrest since the 1950s has had a cumulative effect, causing a build-up of energy in the crust and making the volcano more susceptible to eruption. Previously, it was generally thought that the energy needed to stretch the crust was eventually lost after each period of unrest.
About 360,000 people live on the Campi Flegrei caldera. Naples' population is about one million.
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Re: Earthquake!

#278

Post by Estiveo »

Major earthquake near Mexico City. Preliminary 7.1 magnitude.
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Re: Earthquake!

#279

Post by Addie »

Associated Press - developing
Major earthquake shakes Mexico City

MEXICO CITY -- A powerful earthquake jolted Mexico City on Tuesday, causing buildings to sway sickeningly on the anniversary of a 1985 quake that did major damage to the capital.

The extent of damage or injuries was not immediately clear, but people fled office buildings along the central Reforma Avenue.

Mexico's seismological agency calculated its preliminary magnitude at 6.8 and said its center was east of the city in the state of Puebla.

Pictures fell from walls and objects were shaken off of flat surfaces. Some people dove for cover under desks.

Earlier in the day buildings across the city held preparation drills on the anniversary of the 1985 quake.
"The very least you can do in your life is to figure out what you hope for." - Barbara Kingsolver

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Re: Earthquake!

#280

Post by TollandRCR »

It seems like everything that can go wrong is going wrong. 2017 may be known as the year of natural disasters. And we still have to see NK's reaction to Trump's idiocy.
“The truth is, we know so little about life, we don’t really know what the good news is and what the bad news is.” Kurt Vonnegut

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Re: Earthquake!

#281

Post by ObjectiveDoubter »

We had an earthquake late last night, here in L.A. It was 3.6, but must have been close to the surface (a factor as well as the Richter measurement), as first there was a boom that might have been an explosion but wasn't, then the very strong jerking jolt. Very short, just a second or two unlike the big ones that go on for 30 seconds or more. It was centered near UCLA, but was felt as if it were centered outside my bedroom window here in Sherman Oaks.

I follow @earthquakesLA on Twitter, for just these moments. That retweet icon never spun so fast! Thousands tweeting their So Cal location and what they felt (and what their dogs and cats did).

All I could think of was that before the 1994 biggie, there were two medium ones in Santa Monica Bay, two days and then one day before and that maybe this little terrorist shaking was just the precursor of a big one. Maybe THE Big One. Didn't consider that it might be in Mexico. A 7.1 is huge. Horrible.

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Whip
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Re: Earthquake!

#282

Post by Whip »

that may have just been the aftershock of the gland slam hit off Kershaw in Philly.

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Re: Earthquake!

#283

Post by ObjectiveDoubter »

Whip wrote:
Tue Sep 19, 2017 4:38 pm
that may have just been the aftershock of the gland slam hit off Kershaw in Philly.
Hey! That's my Doyers you're talking about. And that was Clayton's first ever grand slam given up. Ever. We've got no complaints when it comes to Kershaw. Oh, and when was the last time the Phillies saw the sunny side of .500. :fingerwag: Huh????

Aftershock, my Angeleno ass! :lol:

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Re: Earthquake!

#284

Post by Addie »

Associated Press
7.1 magnitude quake kills 55 as buildings collapse in Mexico

MEXICO CITY (AP) — A magnitude 7.1 earthquake rocked central Mexico on Tuesday, killing at least 55 people as buildings collapsed in plumes of dust and thousands fled into the streets in panic.

The quake came less than two weeks after another quake left 90 dead in the country's south, and it occurred as Mexicans commemorated the anniversary of a 1985 quake that killed thousands.

Dozens of buildings collapsed or were damaged in in densely populated parts of Mexico City and nearby states. A column of smoke rose from a structure in one central neighborhood in the capital.

Morelos Gov. Graco Ramirez reported on Twitter that at least 42 people had died in his state south of Mexico City.

At least 11 others died in Puebla state, according to Francisco Sanchez, spokesman for the state's Interior Department. ...

There were no immediate official reports of deaths in the capital, but journalists witnessed some people who had apparently died.
Adding:
CNN: Central Mexico earthquake kills dozens, topples buildings

• US President Donald Trump tweeted: "God bless the people of Mexico City. We are with you and will be there for you."
"The very least you can do in your life is to figure out what you hope for." - Barbara Kingsolver

stoppingby
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Re: Earthquake!

#285

Post by stoppingby »

Addie wrote:
Tue Sep 19, 2017 5:43 pm
Associated Press
7.1 magnitude quake kills 55 as buildings collapse in Mexico

MEXICO CITY (AP) — A magnitude 7.1 earthquake rocked central Mexico on Tuesday, killing at least 55 people as buildings collapsed in plumes of dust and thousands fled into the streets in panic.

The quake came less than two weeks after another quake left 90 dead in the country's south, and it occurred as Mexicans commemorated the anniversary of a 1985 quake that killed thousands.

Dozens of buildings collapsed or were damaged in in densely populated parts of Mexico City and nearby states. A column of smoke rose from a structure in one central neighborhood in the capital.

Morelos Gov. Graco Ramirez reported on Twitter that at least 42 people had died in his state south of Mexico City.

At least 11 others died in Puebla state, according to Francisco Sanchez, spokesman for the state's Interior Department. ...

There were no immediate official reports of deaths in the capital, but journalists witnessed some people who had apparently died.
Adding:
CNN: Central Mexico earthquake kills dozens, topples buildings

• US President Donald Trump tweeted: "God bless the people of Mexico City. We are with you and will be there for you."
I would think the death toll will go higher if that many buildings have collapsed. So terrible. I had never had any interest in going to Mexico until a friend, who was working on her Ph.d in Spanish convinced me to go with her on vacation to Mexico City and Oaxaca. Its a magical country, and I feel terrible that they are going through this, on top of their other problems.

Oh, and Trump? STFU. Everyone knows you're not with them. Stop embarrassing yourself, you racist pile of garbage. (sorry, I just hate it when people are evil to other people, and then pretend to care when tragedy strikes.)

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Addie
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Re: Earthquake!

#286

Post by Addie »

The death toll is over a hundred now. I agree it's a magical country. This is a sad day for Mexico.
stoppingby wrote:
Tue Sep 19, 2017 6:20 pm
I would think the death toll will go higher if that many buildings have collapsed. So terrible. I had never had any interest in going to Mexico until a friend, who was working on her Ph.d in Spanish convinced me to go with her on vacation to Mexico City and Oaxaca. Its a magical country, and I feel terrible that they are going through this, on top of their other problems.
"The very least you can do in your life is to figure out what you hope for." - Barbara Kingsolver

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Re: Earthquake!

#287

Post by TollandRCR »

This being the anniversary of the 1985 killer quake, much of that morning in many places had been given to commemoration and preparation for the next quake.

The AP author may be Mexican, but I wonder if the AP would write about San Franciscans feeling into the streets in "panic."
“The truth is, we know so little about life, we don’t really know what the good news is and what the bad news is.” Kurt Vonnegut

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Addie
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Re: Earthquake!

#288

Post by Addie »

I've heard that the death toll doubled overnight to 200.

More photos from The Atlantic here.

The body of woman hangs crushed by a partially-collapsed building in the neighborhood of Roma Norte, in Mexico City, on September 19, 2017.
"The very least you can do in your life is to figure out what you hope for." - Barbara Kingsolver

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Re: Earthquake!

#289

Post by RVInit »

:cry:
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Re: Earthquake!

#290

Post by WriteItDown »

After that horrible earthquake do you think Donald is going to have the nerve to suggest that Mexico pay for building "the wall"? Will he offer aide to Mexico?
Bloom where you're planted 🌷

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Re: Earthquake!

#291

Post by ObjectiveDoubter »

WriteItDown wrote:
Wed Sep 20, 2017 11:01 am
After that horrible earthquake do you think Donald is going to have the nerve to suggest that Mexico pay for building "the wall"? Will he offer aide to Mexico?
Too personally busy with his unrelenting Hillary Clinton and BHO obsessions, to concern himself. His tweet about Mexico was brief and did not sound like him (i.e., was sent out by staff). His tweet was about supposed poor ratings for the Emmys, where everyone who could, trashed him.

Tweet from our last real president: "Thinking about our neighbors in Mexico and all our Mexican-American friends tonight. Cuidense mucho y un fuerte abrazo para todos."

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Re: Earthquake!

#292

Post by Addie »

Okay, that makes me :crying:
ObjectiveDoubter wrote:
Wed Sep 20, 2017 11:30 am
Tweet from our last real president: "Thinking about our neighbors in Mexico and all our Mexican-American friends tonight. Cuidense mucho y un fuerte abrazo para todos."
"The very least you can do in your life is to figure out what you hope for." - Barbara Kingsolver

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Re: Earthquake!

#293

Post by Addie »

ABC News
More than 200 dead after magnitude 7.1 quake strikes Mexico; 'death toll will rise'

More than 200 people, including 21 schoolchildren, are dead after a magnitude 7.1 earthquake rocked central Mexico on Tuesday afternoon, hitting on the 32nd anniversary of the biggest quake to strike the country's capital.

Yesterday's earthquake was centered about 75 miles southeast of Mexico City and caused extensive damage, leveling at least 44 buildings, including homes, schools and office buildings, according to Mexican President Enrique Pena Nieto, who did a flyover of the city Tuesday afternoon.

Among the dead are at least 25 people — 21 students and four teachers — at a collapsed primary school in the south of the capital. So far, 11 people have been rescued, but two students and one teacher remain missing, according to Education Minister Aurelio Nuno.

Rescuers continued to comb through the wreckage, looking for survivors Wednesday, pausing to listen for voices. Relatives told The Associated Press they received WhatsApp messages from two girls inside.
"The very least you can do in your life is to figure out what you hope for." - Barbara Kingsolver

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Re: Earthquake!

#294

Post by Addie »

Update:
WaPo: Mexican authorities now doubt any child remains trapped in collapsed school
----------------------------------------

CNN
Fears of building's collapse as rescuers race to reach girl trapped under rubble in Mexico ...

At Colegio Enrique Rebsamen -- one of several structures that crumbled in Tuesday's earthquake in Central Mexico -- rescuers are hauling long pieces of lumber and carrying chunks of concrete down away from the debris.

The magnitude-7.1 quake turned dozens of buildings in central Mexico into dust and debris, killing at least 230 people.

The crowds are staying quiet to allow rescuers to hear any voices coming from under the debris, but the sound of metal and concrete cracking punctuates the near silence.

As rescuers clawed through the debris looking for survivors early Thursday morning, volunteers brought water and food amid the chaos. Soldiers, rescuers and medics didn't stop working despite the rain and the risk of the building's further collapse.



The search for survivors at the school intensified Wednesday afternoon when rescuers made contact with the 12-year-old girl and when temperature readings suggested that two others might be alive inside, CNN affiliate Foro TV reported.
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Re: Earthquake!

#295

Post by Addie »

ABC News
US search and rescue experts arrive in Mexico after deadly earthquake

A team of American experts is in Mexico to assist with search and rescue efforts following the deadly earthquake that devastated the country's capital city Tuesday.

67 people and five dogs landed in Mexico this morning, along with 62,000 pounds of specialized tools and medical equipment, to conduct around-the-clock rescue missions and help assess the damage.

The group is made up of members from USAID's Office of U.S. Foreign Disaster Assistance as well as an urban search and rescue team from the Los Angeles County Fire Department, according to a statement from acting USAID Spokesperson Clayton McCleskey.

LAFD personnel are from what is known as the "heavy" team and are specially trained to deal with significant disasters involving collapsed buildings, USAID administrator Mark Green said in a briefing today.
Note: Israeli and Japanese teams have also arrived in Mexico.
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Re: Earthquake!

#296

Post by vic »

There's a tiny error in that ABC report. As they say, this is a Los Angeles County Fire Department team. Later, they refer to it as LAFD, which is the Los Angeles (City) Fire Department. The county fire department uses the abbreviation LACOFD (actually, LACoFD).

Both the city and county have FEMA task forces (California Task Force 1 is LAFD, California Task Force 2 is LACoFD). CA-TF1 was deployed to Texas and Florida, and recently returned.

Two of FEMA's urban search and rescue task forces, CA-TF2 and VA-TF1 (Fairfax County, Virginia) also work with the United States Agency for International Development’s Office of Foreign Disaster Assistance.

I didn't know these details about the FEMA teams until recently. Someone asked on one of the LAFD feeds (might have been on Facebook or Twitter) if they'd be going to Mexico, and they explained about the USAID teams, and that there were just two - one on the east coast, and one on the west coast.

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Re: Earthquake!

#297

Post by TollandRCR »

Some Italian seismologists are becoming concerned that Europe’s largest volcano may be preparing to erupt again. Unless they could be warned, this would put at great risk the 360,000 persons who live inside the large caldera. The 1.2 million people in the Naples region would also be affected. If the eruption were as large as seen in the geological record it could cause climate change.

Part of the reason for concern is that there have been few earthquakes in the past 30 years. Another part is that the caldera is smoldering; that recently killed an 11 year old boy and the parents who tried to rescue him. Another part is that volcanic activity has increased elsewhere in Italy in the past year.

The better known conical volcano, Vesuvius, is nearby.
“The truth is, we know so little about life, we don’t really know what the good news is and what the bad news is.” Kurt Vonnegut

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Re: Earthquake!

#298

Post by Volkonski »

Search for Mexico earthquake survivors goes on as toll reaches 286

http://www.braintreeandwithamtimes.co.u ... oll_grows/
The city government said 60 people had been rescued since the quake hit at midday on Tuesday.
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Re: Earthquake!

#299

Post by RVInit »

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Addie
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Re: Earthquake!

#300

Post by Addie »

The New Yorker
The Strange Tectonic Coincidence of Mexico’s September Earthquakes ...

The cruel coincidence of there being a large earthquake in Mexico City on September 19th, the exact anniversary of the devastating magnitude-8.1 quake that killed at least five thousand people in the city in 1985, seems similarly preordained. But a closer look at the details partly dispels its statistical improbability. Neither quake was actually centered on Mexico City. The epicenter of the 1985 event was two hundred and twenty miles to the west, off the coast of Michoacán, while the recent quake was generated about seventy miles to the southeast, in the state of Puebla. Seismic waves emanate in all directions from their origins, and regions closer to these epicenters were hit harder than Mexico City. But, with a population of close to twenty million, the capital simply has more people and buildings likely to be affected—and the old lake sediments on which Tenochtitlan was built have an unfortunate tendency to magnify seismic waves, and sometimes to liquefy altogether.

A more interesting coincidence is the fact that the two large earthquakes that struck Mexico this month—the 7.1-magnitude Puebla event, on September 19th, and the 8.1-magnitude Gulf of Tehuantepec quake, twelve days earlier—were both exceptions to some general geophysical rules. Since the start of the new millennium, millions of Earthlings have been involuntary students in a rigorous experiential course on plate tectonics. There have been particularly punishing lessons about subduction zones, where old, dense ocean crust, often stuck in place for centuries, slides back into Earth’s mantle in a matter of seconds. The 9.1-magnitude Sumatra-Andaman earthquake, in 2004, and the 9.0-magnitude Tohoku quake, in Japan, in 2011, both of which spawned enormous tsunamis, occurred at such boundaries. The spectre of a similar catastrophe along the Cascadia subduction zone, in the Pacific Northwest, keeps many residents of Portland, Seattle, and Vancouver awake at night.

The west coast of Central America is another region where subduction has shaped the landscape. The imposing volcanoes of central Mexico and Guatemala—including Popocatépetl, which looms on the horizon in Mexico City—owe their existence to the subduction of the Cocos Plate beneath the North American Plate at the brisk clip of three inches per year. The tragic 1985 earthquake that devastated Mexico City was in fact triggered by slip on a segment of the Cocos. It would therefore be reasonable to assume that the two large earthquakes that jarred Mexico this month were classic subduction-zone events. In fact, neither was, and both were anomalies in several respects.

To begin with, the quakes emanated not from the top of the Cocos Plate, where the subduction actually happens, but from significantly deeper, within that plate, at depths of about thirty and forty-five miles, respectively. And, in both cases, the plate slipped in an unusual way. So-called megathrust events, such as the Sumatra and Tohoku quakes, typically involve slip with “reverse” motion, like an Aztec temple builder pushing a rock slab up a ramp. The two September earthquakes, though, were caused by “normal” motion, akin to an errant slab sliding back down the ramp. Normal slip occurs when rocks are being stretched rather than squeezed—the opposite of what one would expect in a subduction setting. In other words, normal faulting is not the norm in subduction.
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