The Detroit Post
Thursday, 28 October, 2021

How Is Earthquake Weather

Christina Perez
• Wednesday, 02 December, 2020
• 7 min read

Solar flares and magnetic storms belong to a set of phenomena known collectively as “space weather “. Technological systems and the activities of modern civilization can be affected by changing space- weather conditions.

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An earthquake occurs when two blocks of the earth’s crust slide past one another after having been stuck together in one place for a long time, because of friction on the fault... California is firmly planted on the top of the earth’s crust in a location where it spans two tectonic plates.

The San Andreas Fault System, which crosses California from the Salton Sea in the south to Cape Mendocino in the north, is the boundary between the Pacific Plate (that includes the... The earliest reference we have to unusual animal behavior prior to a significant earthquake is from Greece in 373 BC.

Rats, weasels, snakes, and centipedes reportedly left their homes and headed for safety several days before a destructive earthquake. Anecdotal evidence abounds of animals, fish, birds, reptiles, and insects exhibiting strange...

USGS's scientists can only calculate the probability that a significant earthquake will occur in a specific area within a certain number of years. Early on the morning of August 24, 2014, Loren Turner was awoken by clattering window blinds, a moving bed, and the sound of water splashing out of his backyard pool.

A newly published paper concludes that a modest (one-foot) tsunami-like event on the East Coast was generated in the past by a large offshore earthquake. As Hurricane Dennis approaches the east coast of the United States, the U.S. Geological Survey is gearing up to monitor and measure the effects of the storm and communicate this critical information to local, state, and federal officials involved in saving lives and property during major storms.

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This theory led to a belief in earthquake weather ', that because a large amount of air was trapped underground, the weather would be hot and calm before an earthquake. A later theory stated that earthquakes occurred in calm, cloudy conditions, and were usually preceded by strong winds, fireballs, and meteors.

A modern theory proposes that certain cloud formations may be used to predict earthquakes; however, this idea is rejected by most geologists. When the stress on the edge of a tectonic plate overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that is felt.

Humphreys argued that “the general state of irritation and sensitiveness developed in us during the hot, calm, perhaps sultry weather given this name, inclines us to sharper observation of earthquake disturbances and accentuates the impression they make on our senses, so that we retain more vivid memories of such quakes while possibly over-looking entirely the occurrences on other more soothing days”. Some recent research has found a correlation between a sudden relative spike in atmospheric temperature 2–5 days before an earthquake.

It is speculated that this rise is caused by the movement of ions within the earth's crust, related to an oncoming earthquake. Furthermore, this relative temperature change would not cause any single recognizable weather pattern that could be labelled earthquake weather “.

Seen from space: Map shows surface displacement from Ridge crest earthquakes How do the effects of the coronavirus pandemic compare to that of a major earthquake ? The changing weight of these lakes is thought to have had a regulating effect by triggering periodic approximately magnitude 7 earthquakes to relieve built up tectonic pressures.

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The current Salton Sea, California's biggest lake, formed when an irrigation engineering project accident in 1905 allowed the Colorado River to flood into the Salton Sink and form the body of water that would become more visited than Yosemite Valley in the mid- 20th Century. Now the increasingly salty water has killed most of the fish that millions of birds, such as white pelicans and eared grebes that make up 80 to 95 percent of the Western populations have relied on.

This theory lead to a belief in earthquake weather, that because a large amount of air was trapped underground, the weather would be hot and calm before an earthquake. A later theory stated that earthquakes occurred in calm, cloudy conditions, and were usually preceded by strong winds, fireballs, and meteors.

J. Marshall Shepherd, a leading international expert in weather and climate, was the 2013 President of American Meteorological Society (AMS) and is Director of the University of Georgia’s (UGA) Atmospheric Sciences Program. Prior to UGA, Dr. Shepherd spent 12 years as a Research Meteorologist at NASA-Goddard Space Flight Center and was Deputy Project Scientist for the Global Precipitation Measurement (GPM) mission.

Shepherd is frequently sought as an expert on weather and climate by major media outlets, the White House, and Congress. Couldn't load this module, please refresh the page to see the contents.

CNN The Weather Channel Reuters ABC News While the remote location undoubtedly minimized impacts, the quakes did serve as a wake-up call for complacent Californians that they live in Earthquake Country and need to prepare for the inevitable “Big One” that scientists say is sure to come.

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They note that while such large low-pressure changes could potentially be a contributor to triggering a damaging earthquake, “the numbers are small and are not statistically significant.” We asked geophysicist Paul Lindgren of NASA’s Jet Propulsion Laboratory in Pasadena, California, to do a scientific shakedown on the matter.

The largest climate variable that could change fault stress loads is surface water in the form of rain and snow. “Typically, where we’ve seen these types of correlations is in microseismicity -- tiny earthquakes with magnitudes less than zero, far smaller than humans can feel,” he said.

Lindgren cited work by his colleague Jean-Philippe Bivouac at Caltech and others, who’ve found a correlation between the amount of microseismicity in the Himalaya and the annual monsoon season. During the summer months, large amounts of precipitation fall on the Indo-Gangetic Plain, which encompasses the northern regions of the Indian subcontinent.

These increases stress loads on Earth’s crust there and decreases levels of microseismicity in the adjacent Himalaya. During the winter dry season, when there’s less water weight on Earth’s crust in the plain, Himalayan microseismicity peaks.

Precipitation during the annual monsoon season in the Indo-Gangetic Plain increases stress loads on Earth’s crust there and decreases the number of microearthquakes in the adjacent Himalaya. Conversely, during the dry season, the reduced water weight on Earth’s crust in the plain causes microseismicity in the Himalaya to peak.

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“We don’t know when a fault may be at the critical point where a non-tectonic forcing related to a climate process could be the straw that breaks the camel’s back, resulting in a sizeable earthquake, and why then and not earlier?” he said. Research by GPL scientist Donald Argus and others in 2017 using data from a network of high-precision GPS stations in California, Oregon and Washington found that alternating periods of drought and heavy precipitation in the Sierra Nevada between 2011 and 2017 actually caused the mountain range to rise by nearly an inch and then fall by half that amount, as the mountain rocks lost water during the drought and then regained it.

The Sierra Nevada range in California rose almost an inch between 2011 and 2015 during a period of drought due to loss of water from within fractured rocks. Similarly, pumping of groundwater from underground aquifers by humans, which is exacerbated during times of drought, has also been shown to impact patterns of stress loads by “weighting” Earth’s crust.

Lindgren pointed to a 2014 study in the journal Nature by Amos et al. that looked at the effects of groundwater extraction in California’s Central Valley on basicity on the adjacent San Andreas Fault. The researchers found that such extractions can promote lateral changes in stress to the two sides of the San Andreas, which move horizontally against each other along the boundary of two major tectonic plates.

However, says Lindgren, the Fort Tenon segment of the San Andreas Fault that is nearest to the Central Valley last ruptured in 1857, so given the erratic nature of earthquakes along the fault and the great variability in time between events, with our current level of knowledge, scientists are far from understanding when and where the next large earthquake will occur on it. The retreat of a glacier can reduce stress loads on Earth’s crust underneath, impacting the movement of subsurface magma.

Glacial earthquakes in Greenland peak in frequency in the summer months and have been steadily increasing over time, possibly in response to global warming. For example, water stored in large dams has been linked to earthquake activity in various locations around the world, though the impact is localized in nature.

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Shortly after the water in the reservoir was drawn down to its lowest level since it was originally filled in order to repair intakes to the dam’s power plant and then refilled, the earthquakes occurred. Lake Oroville in California was the site of a magnitude 5.7 earthquake in 1975 that was linked to changing stress loads on a local fault triggered by fluctuations in the reservoir’s water level.

Research conducted by USGS geophysicist Elizabeth Cochran and her university-based colleagues suggests that this earthquake was induced by injection into deep disposal wells in the Wilmette North field. Lindgren says when he first started studying earthquakes, everything was focused on understanding them within the context of plate tectonics and processes happening within Earth’s crust.

Weather Shortly before midnight Friday night, people in Los Angeles were jolted by a 4.5 magnitude earthquake. According to the U.S. Geological Survey, the federal entity that tracks earthquakes, the quake originated just outside South El Monte, less than 15 miles from the heart of downtown Los Angeles.

People took to social media to report what they experienced and sound warnings. Los Angeles' ABC affiliate spoke with Seismologist Dr. Lucy Jones, who said the quake was similar in location and its type to the 1987 Whittier-Narrows quake, killing three people.

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