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A 9.2 Earthquake and a Tsunami that flows

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A 9.2 Earthquake and a Tsunami that flows

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https://earthquake.usgs.gov/earthquakes/events/alaska1964/ Here is an article about the second biggest earthquake that was recorded but if that wasn't enough a huge tsunami followed soon after.

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Th is where an earthquake stroke, devastating Italian buildings. Also 247 people were reported missing or dead after it happened with the search team. It happened so fast that people didn't know what happened.

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One of the biggest earthquakes in California hits napa wine valley in 2014

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The earthquake that rattled Napa Valley wine country early Sunday morning clocked in at a magnitude 6.0. That was big enough to be felt across the Bay Area and to damage buildings, spark fires, and cause injuries in this populated region.

But it was far from the biggest in a state that was home to five of the ten biggest quakes on record in the lower 48 U.S. states. (Related: " What Caused California's Napa Valley Earthquake? Faults Explained.")

Sunday's shake-up was one of the largest to strike northern California since the magnitude 6.9 Loma Prieta quake in 1989. But quakes of magnitude 6.0 and greater are not uncommon historically along California's network of faults, notably the San Andreas.

The buildup and periodic release of seismic pressure along the northern San Andreas fault in the 1800s produced a series of magnitude 6.0 or greater earthquakes, leading up to the famous 1906 San Francisco magnitude 7.8 earthquake, says John Rundle, a geophysicist at the University of California, Davis. And that pressure is building again, seismologists think. "History will not necessarily repeat itself, but we might see something similar," he added.

As for the biggest quakes in recorded history, size estimates vary. Over the past century, the ways that earthquake magnitude and intensity are recorded have changed with improving seismic measurements. The well-known Richter scale was devised in the 1930s to describe the relative sizes of earthquakes in southern California. In the 1970s, the moment magnitude scale was introduced to describe the physical size of an earthquake, and is preferred for very large earthquakes.

Here are the biggest earthquakes in California's recorded history, according to magnitude estimates from the U.S Geological Survey.

Often compared to the devastating 1906 San Francisco earthquake, the Fort Tejon quake actually caused larger average ground movements than the more famous 1906 quake. Horizontal displacement along the fault was as much as 29.5 feet (9 meters). The rupture, which shook the San Andreas fault north of Los Angeles, set off tremors felt throughout northern and southern California and inland as far east as Las Vegas. One person died when an adobe house collapsed.

Twenty-seven people were killed when a row of houses collapsed in Lone Pine, east of the Sierra Nevada mountains, in the early morning. Both dip-slip and strike-slip faulting, referring to vertical and horizontal movements of the Earth's crust, occurred on the Owens Valley fault, moving the ground horizontally as much as 23 feet (seven meters) and vertically an average of three feet (one meter). The earthquake was felt throughout California and into Nevada. It stopped clocks in San Diego and caused an estimated $250,000 of property loss, a large amount of money at the time.

Ground fissures and rock slides, crumbled adobe and plaster, and some 155 tremors followed this quake that struck near Baja, California. Both dip-slip and strike-slip movement probably produced the earthquake on the Laguna Salada fault. Aftershocks continued every few days through April 1892. But the earthquake affected a largely uninhabited region, and no deaths were reported.

Striking early in the morning, the "Great Quake" of 1906 left more than 80 percent of the city damaged from the quake itself and from fires. With the quake's epicenter near San Francisco, tremors from the shaking caused by rupture and horizontal displacement of the San Andreas fault were felt from southern Oregon to southern California and inland to central Nevada. Although some estimates place the number of deaths from the earthquake and fires at around 700, the number is now thought to be at least 3,000.

The 1906 earthquake remains one of the most significant earthquakes in U.S. history. Scientists study the quake as an example of seismic cycles in the Bay Area in which a huge quake, of magnitude 7.0 or more, is preceded by a series of smaller earthquakes.

This offshore quake caused by the Mendocino fault off the coast of northern California was felt from Eugene, Oregon, to San Francisco. In 1992, a series of earthquakes greater than magnitude 6.5 struck over an 18-hour period in the same region. In 2010, another magnitude 6.5 offshore earthquake shook coastal Eureka, breaking windows and snapping power lines.

The largest temblor in the lower 48 United States since the 1906 San Francisco earthquake, this quake caused property damage estimated at $60 million and claimed 12 lives. The shock was felt over most of California, in western Arizona, and in western Nevada. Nearly 200 aftershocks of magnitude greater than 4.0 were recorded through September 1952.

This early morning quake with an epicenter near the southern California town of Landers shifted the ground horizontally as much as 18 feet (5.5 meters) and vertically as much as 5.9 feet (1.8 meters). Three people died and more than 400 were injured. The shaking was felt throughout southern California, Nevada, Arizona, and Utah, as far north as Idaho, east to New Mexico and Colorado.

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7 Biggest Earthquakes in California History-Napa's Not Even Close

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The earthquake that rattled Napa Valley wine country early Sunday morning clocked in at a magnitude 6.0. That was big enough to be felt across the Bay Area and to damage buildings, spark fires, and cause injuries in this populated region.

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https://www.youtube.com/watch?v=T0AEtX-uPLA

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Earthquake   geology   Britannica com.png

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A powerful earthquake struck Mexico on Tuesday afternoon, toppling buildings, killing children in a school that collapsed, rattling the capital and sending people flooding into the streets for the second time in just two weeks.

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Mexico Earthquake Kills Hundreds, Trapping Many Under Rubble (Published 2017)

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In Mexico City, where a school collapsed, ordinary citizens used their bare hands to try to free the students trapped in the rubble.

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This video
is about what happens when earthquakes occur,what dose the damage look like, and how many happen in a year.

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Explore National Geographic. A world leader in geography, cartography and exploration.

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A powerful earthquake struck Mexico on Tuesday afternoon, toppling buildings, killing children in a school that collapsed, rattling the capital and sending people flooding into the streets for the second time in just two weeks.

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Javascript must be enabled to view our earthquake maps. To access USGS earthquake information without using javascript, use our Magnitude 2.5+ Earthquakes, Past Day ATOM Feed or our other earthquake feeds.

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Javascript must be enabled to view our earthquake maps. To access USGS earthquake information without using javascript, use our Magnitude 2.5+ Earthquakes, Past Day ATOM Feed or our other earthquake feeds.

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1989 loma prieta earthquake

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This website is about the latest earthquakes and how to prevent/ find out to predict where they will be

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https://en.wikipedia.org/wiki/Earthquake
This is a Wikipedia page about what earthquakes are, and some of the causes and effects of earthquakes.

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this article show the latest earthquake and how they started and predict how strong they were.

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This video explains what earthquakes are: https://www.youtube.com/watch?v=uA_OLKfQpYA

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Earthquakes cause road cracks, structural damage in Hawaii Volcanoes National Park

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https://www.nationalgeographic.com/science/earth/the-dynamic-earth/plate-tectonics/#close
This article talks about how the plates, and volcanoes are made and about the lithosphere , the earths crust.

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http://www.tectonics.caltech.edu/outreach/highlights/sumatra/what.html
This article is about the 2004 Sumatra earthquake that later caused a tsunami. This was one of the most deadly natural disasters ever.

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http://www.foxnews.com/science/2018/05/04/6-9-magnitude-earthquake-hits-hawaii-s-big-island-usgs-says-following-recent-volcanic-eruption.html
This short article is about a 6.9 magnitude earthquake hitting
Hawaii´s bid island.

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https://zidbits.com/2010/11/an-earthquake-once-caused-the-mississippi-river-to-flow-backwards/
A huge earthquake back in the 1800's caused the Mississippi river to flow backward.

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https://www.nationalgeographic.com/science/earth/the-dynamic-earth/plate-tectonics/

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Unusual earthquake in Mexico:
On September 7th, there was an unusual earthquake in Mexico City. The earthquake was huge, a 8.2 magnitude level, it injured at least 200 people, and many buildings were damaged. The earthquake warning only gave citizens 86 seconds to prepare, and the article says, "Mexico’s seismology agency has registered at least 337 aftershocks, with the strongest reaching a magnitude of 6.1". I thought this earthquake was pretty unique-- and not in a good way.

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Carlos Jasso/Reuters

A deadly magnitude-8.2 earthquake struck the southern coast of Mexico on 7 September, killing dozens of people and injuring at least 200. The tremor, which Mexican President Enrique Peña Nieto said was the strongest registered in the past century, prompted mass evacuations along the country's Pacific coast.

Scenes of demolished buildings, teetering streetlight posts and blacked-out subway stations have been circulating on social media. Mexico's Federal Commission of Electricity calculates that 1.85 million residents across the country were affected by power cuts.

According to the National Seismological Service of Mexico, the quake hit the Gulf of Tehuantepec near the state of Chiapas just before midnight local time. The country's earthquake early-warning system gave residents anywhere from a few seconds to more than a minute of warning, depending on their proximity to the tremor's epicentre. In Mexico City, more than 725 kilometres away, that amounted to 86 seconds of advance notice.

Mexico City resident and agronomist Obed Mejía Yáñez was in a 23rd-floor apartment at the moment alarms went off in his building. "I was writing my thesis when it hit. The lights went on and off, and the windows began to crack," he says. "I said 'this is it' and even thought about jumping out the window. I got very scared. I had never felt an earthquake like this."

Although buildings in the capital suffered some structural damage, the southern states of Oaxaca, Chiapas and Tabasco were the most affected, with more than 30 confirmed deaths. In Oaxaca, patients were evacuated to the streets in hospital beds and several buildings collapsed, including the city hall in Juchitán.

The region where the earthquake struck is one of the most active seismic zones in the country: this is where the Cocos Plate dives, or subducts, under the North American plate. "Earthquakes of this size are not uncommon at subduction zone boundaries," notes Jascha Polet, a seismologist at California State Polytechnic University in Pomona.

But this quake was different: it occurred within the Cocos plate as it warped or bent, not at the boundary with the North American plate, according to the US Geological Survey.

"The type of faulting that occurred here does not usually produce earthquakes of this magnitude," says Polet. "There have been others in the past 50 years of similar type and location, but none that was even close to this size." It is still too early to say why the earthquake was so massive, she adds, but "it is sure to inspire much future research".

Mexico's seismology agency has registered at least 337 aftershocks, with the strongest reaching a magnitude of 6.1.

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Deadly Mexico earthquake had unusual cause

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Carlos Jasso/Reuters A deadly magnitude-8.2 earthquake struck the southern coast of Mexico on 7 September, killing dozens of people and injuring at least 200. The tremor, which Mexican President Enrique Peña Nieto said was the strongest registered in the past century, prompted mass evacuations along the country's Pacific coast.

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https://earthquake.usgs.gov/learn/kids/eqscience.php
The article I read was about how we can predict when earthquakes happen. Seismograms come in handy for locating earthquakes.

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https://kids.nationalgeographic.com/explore/science/earthquake/#earthquake-houses.jpg
This article is about the background of how earthquakes are formed, and how much damage they can cause. It also gives some facts on earthquakes damage in the past.