“A series of aftershocks, the most powerful of which had a magnitude of 7.0, were recorded in southeastern Alaska along the border of the United States and Canada on Saturday afternoon.”, — write: www.pravda.com.ua
Source: USA Today, Alaska News, Reuters
Details: According to the United States Geological Survey (USGS), the earthquake occurred around noon local time. The epicenter of the disaster was approximately 90 km north of the town of Yakutat.
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The main shock triggered a series of aftershocks, several of which exceeded the 5.0 mark. Earth tremors were felt even in the state’s largest city, Anchorage, located almost 500 kilometers from the epicenter.
The National Tsunami Warning Center quickly announced that there is no threat of a tsunami, but experts continue to monitor the development of the situation. No information about casualties or significant damage has been received so far.
For reference: Magnitude is a logarithmic indicator of the strength of an earthquake, where each successive whole number means a 10-fold increase in intensity.
According to the Michigan Technological University classification, tremors with a magnitude of 7.0 to 7.9 qualify as a “major earthquake” capable of causing serious damage to infrastructure.
According to statistics from the NASA Earth Observatory, on average, about 18 earthquakes of this magnitude are recorded on the planet every year, and one large earthquake of magnitude 8.0 or greater.