Connect with us

Planet Earth

Research Suggests California Earthquake Risk Higher than Previously Thought

Research Suggests California Earthquake Risk Higher than Previously Thought 86

Geophysicists are hypothesizing that the San Andreas fault line in California could be the central point of a massive earthquake after new research suggested that the fault may be at higher risk than previously thought.

Researchers at Arizona State University have published a new study looking at the likelihood of a 7.5-magnitude (or stronger) quake occurring and rupturing the entire fault line.

It has long been thought that the central section of the fault line, which stretches 90 miles from San Juan Bautista southward to Parkfield, was creeping steadily in such a way that provided for the safe release of energy. That “creeping” movement, scientists believed, lessened the chances of a huge quake rupturing the entire fault line — but new research casts doubt over old assumptions.

© M. Khoshmanesh / ASU

© M. Khoshmanesh / ASU

Slow earthquakes

The researchers found that the fault line has seen a sequence of “stick-and-slip” movements, or “slow earthquakes,” which release energy over a number of months. These slow earthquakes pass without being noticed by people, but they can trigger larger and more destructive quakes in the region.

“What looked like steady, continuous creep was actually made of episodes of acceleration and deceleration along the fault,” said Mostafa Khoshmanesh, a graduate research assistant in the ASU’s School of Earth and Space Exploration (SESE) and the lead author of a paper on the new research.

Another researcher, Manoochehr Shirzaei, who is the co-author of the paper, explained that the movement on the fault began every “one to two years” and then lasted for several months before ceasing. The pattern of these slow quakes led to “increased stress” on other segments of the fault, north and south of the central section.

The scientists found that the central part of the fault has an average movement of about three centimetres a year — or just over an inch. The distance sometimes varies, they said, some years moving by as much as four inches.

© M. Khoshmanesh / ASU

© M. Khoshmanesh / ASU

Higher risk

The authors of the research say that their findings are significant because they have uncovered a new kind of earthquake-triggering movement which is not accounted for in the current models of prediction used in the state.

Shirzaei said that, based on the new observations, he believes the seismic hazard in California is something that varies over time but is “probably higher than what people have thought up to now.”

So when is it going to happen? Well, that’s the big question.

No one really knows, but Khoshmanesh explained that based on current models, there’s a “75 percent chance” of a magnitude 7 or larger quake in northern and southern California “within the next 30 years.”

RT

Planet Earth

Polar vortex: “wild” winter is coming in the US, Northern Europe and East Asia after the 16th of January

Polar vortex: "wild" winter is coming in the US, Northern Europe and East Asia after the 16th of January 99

In the upper atmosphere above the North Pole, experts saw a rapidly swirling vortex of cold air that could bring severe frosts to the United States, Northern Europe and East Asia. Serious cold snap and snowy weather are expected after January the 16th.

Snowfalls and a cold snap hit South Korea since the start of 2021, hitting historic snow maximums and temperatures. In the country, for the first time since 1964, television and newer communications are sending people cold snap warnings:

https://twitter.com/sonyeoljin/status/1346841272347082752?ref_src=twsrc%5Etfw

The situation is similar in Japan, where a new snow storm hit historic highs:

On January 7, the thermometer In Beijing dropped to -20 degrees Celsius, breaking the 1966 record. In other regions of China, the temperature is also not sugar, and you can only move around in special uniforms:

The cold even reached Taiwan, where the temperature in some areas dropped below freezing point, snow poured down and people realized that rice terraces can be used as a ski jump:

Even more snow went to Spain, where on January 6, 2021, a temperature of -34.1 ° C was recorded – the lowest on record. After that, a snow storm hit the country, which has not been seen for 80 years:

https://youtu.be/pHU533Krs5M

The same thing happens in Canada and in the northern states of the United States:

It seems that after a stratospheric warming, the subpolar vortex began to split:

The vortex itself is a standard phenomenon. However, this time experts were surprised at his movement. It is possible that in the near future it will be divided into two parts. 

Scientists associate the strange behavior with the changed climate in the Arctic, which has become warmer. From September to December, the amount of ice cover decreased significantly.

The polar vortex is a low-pressure region located in the stratosphere and filled with cold air. When the jet stream of air that holds the vortex weakens, the low pressure area moves south. 

As the ice shrinks, more moisture will move inland. It will turn to snow, so snowfalls are expected. Snow, in turn, reflects heat, leading to a cold snap.

Continue Reading

Planet Earth

Hospital in Naples was evacuated after a new, huge sinkhole appeared

Hospital in Naples was evacuated after a new, huge sinkhole appeared 100

Eyewitnesses said they heard a loud crash at dawn when a huge hole in the ground formed outside the Ponticelli Ospedale del Mare hospital in eastern Naples.

Early in the morning of January 8, 2021, a sinkhole occurred in the parking lot of a clinic in Naples. The depth of the formed cavity is about 20 meters, the total area of ​​the hole is about 2,000 square meters.

No casualties were found at the scene; firefighters say the sinkhole “affected an area of ​​about 500 square meters” and engulfed several cars parked near the hospital.

As the press writes and as a little can be seen from the videos, rescuers and firefighters were running around the pit together with the governor of the area.  But who should be there in the forefront are Italian geologists, since Naples stands in the very center of the volcanic system known as the Phlegrean Fields.

If the surface collapsed, moreover – the surface reinforced with concrete and reinforced from below with some kind of communications, then we are talking about serious soil deformations caused by the activity of magma.

Italy has been in doubt since the summer of 2020, because swarms were observed there in very atypical places in May, and according to the forecasts of old Italian seismologists, who had witnessed many strong earthquakes, it should have boomed in the August region.

Fortunately, nothing bad happened to Italy and there was no big earthquake. But, since there are swarms, it means that something is being prepared, the magma is gathering strength. 

Following this particular sinkhole event – an obvious sign that a major earthquake in Italy is already very close.

Continue Reading

Planet Earth

A new great pandemic cycle has begun (again) in China

A new great pandemic cycle has begun (again) in China 101

In the first months of 2020, the whole world with a certain fright followed the events unfolding in China, where people fell on the streets during the day and astronauts wandered, and in the evening crematoria began to smoke. And now, with the onset of December, the cycle seems to be repeating itself.

Shunyi area in Beijing, where the authorities announced “wartime status” the day before. As you can see in the videos, thousands of people are lined up in the queue for mandatory testing:

Dalian city, where “wartime” is also declared. Neighborhoods are blockaded, people are walled up in entrances, familiar characters of George Lucas roam the streets:

https://twitter.com/UndergroundSilk/status/1341741036297723905?ref_src=twsrc%5Etfw

Chinese ‘rescuers’, before performing a combat mission:

Chengdu City:

Daluo Port, Yunnan – tourists came for adventure and they received the ‘time of their life’ after leaving the ramp:

If something happens in Beijing, it does not mean that tomorrow the same will happen everywhere. However, the trend towards such dynamics is observed and, as the practice of the first wave of the pandemic has shown, all countries and people, to one degree or another, have taken into account the ‘Chinese experience’. 

Therefore, one must think that everything will now be in peace, as in spring – a new global round of the fight against the Covid has begun in China, a new great pandemic cycle!

Continue Reading
Advertisement

DO NOT MISS

Trending