Scientists have warned there could be a big increase in numbers of devastating earthquakes around the world next year. They believe variations in the speed of Earth’s rotation could trigger intense seismic activity, particularly in heavily populated tropical regions.
Although such fluctuations in rotation are small – changing the length of the day by a millisecond – they could still be implicated in the release of vast amounts of underground energy, it is argued.
The link between Earth’s rotation and seismic activity was highlighted last month in a paper by Roger Bilham of the University of Colorado in Boulder and Rebecca Bendick of the University of Montana in Missoula presented at the annual meeting of the Geological Society of America.
“The correlation between Earth’s rotation and earthquake activity is strong and suggests there is going to be an increase in numbers of intense earthquakes next year,” Bilham told the Observer last week.
In their study, Bilham and Bendick looked at earthquakes of magnitude 7 and greater that had occurred since 1900. “Major earthquakes have been well recorded for more than a century and that gives us a good record to study,” said Bilham.
They found five periods when there had been significantly higher numbers of large earthquakes compared with other times. “In these periods, there were between 25 to 30 intense earthquakes a year,” said Bilham. “The rest of the time the average figure was around 15 major earthquakes a year.”
The researchers searched to find correlations between these periods of intense seismic activity and other factors and discovered that when Earth’s rotation decreased slightly it was followed by periods of increased numbers of intense earthquakes. “The rotation of the Earth does change slightly – by a millisecond a day sometimes – and that can be measured very accurately by atomic clocks,” said Bilham.
Bilham and Bendick found that there had been periods of around five years when Earth’s rotation slowed by such an amount several times over the past century and a half. Crucially, these periods were followed by periods when the numbers of intense earthquakes increased.
“It is straightforward,” said Bilham. “The Earth is offering us a five-year heads-up on future earthquakes.”
This link is particularly important because Earth’s rotation began one of its periodic slowdowns more than four years ago. “The inference is clear,” said Bilham. “Next year we should see a significant increase in numbers of severe earthquakes. We have had it easy this year. So far we have only had about six severe earthquakes. We could easily have 20 a year starting in 2018.”
Exactly why decreases in day length should be linked to earthquakes is unclear although scientists suspect that slight changes in the behaviour of Earth’s core could be causing both effects.
In addition, it is difficult to predict where these extra earthquakes will occur – although Bilham said they found that most of the intense earthquakes that responded to changes in day length seemed to occur near the equator. About one billion people live in the Earth’s tropical regions.
You most likely are going to lose power in an Earthquake Disaster.
Most cities aren't structurally equipped to handle minor earthquakes- much less major ones.
Check this out:
Minor Earthquake leaves hundreds in the dark in Oklahoma City Suburb
EDMOND, Okla. — An earthquake registering a 4.2 magnitude in central Oklahoma disrupted electric power to hundreds of customers.
The U.S. Geological Survey initially reported the 4.4-magnitude tremor was detected at 9:56 p.m. Wednesday about 4 miles east-northeast of Edmond, Oklahoma — about 15 miles northeast of Oklahoma City. The USGS later revised the earthquake down to a magnitude 4.2.
Edmond officials said two electric substations were knocked out, darkening the northeastern part of the city and leaving about 1,900 customers without power. Electricity was later restored to both substations, and the city said all customers should have their power back.
The police department said on its Twitter page that no significant damage was reported.
The quake was the sharpest of six tremors detected in the Edmond area over a 24-hour period.
Scientists have linked some oil and gas production in Oklahoma to an uptick in earthquakes, but the frequency of earthquakes had dropped recently as the state imposed restrictions on the injection of wastewater into underground disposal wells.
A Power outage will happen, but we can do something about it.
These Earthquakes are going to become more common in areas where Earthquakes are uncommon; such as the Appalachian Mountains in East America as companies continue the controversial practice of 'fracking.' At the same time, we have an aging power grid in much of the world. Much of this grid is so fragile that it would snap apart in even a minor earthquake.
Power outages can be uncomfortable to many. They can also disrupt your plans including vital business transactions carried out on personal electronic devices. Such power outages can also disrupt vital communication from emergencies to family communications.
It's bad enough you're going to have to go without refrigeration along with most other electrical power for an uncertain amount of time. Its worse without your modern personal devices.
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