The most powerful earthquake in recorded history occurred in Helsinki.

The strongest earthquake in the history of measurements occurred in Helsinki on Christmas Day, broadcaster Yle reports.
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“According to Toni Veikkolainen, a seismologist at the University of Helsinki, the Christmas Day earthquake had a magnitude of 1.1… It was the strongest earthquake ever measured in Helsinki,” the material says.

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The earthquake lasted less than a minute. The exact cause is not yet clear, but it did not appear to be a “human-caused” earthquake.

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Residents of several areas located near the epicenter of the earthquake heard a strong bang, and the police received reports of an explosion, the broadcaster said.

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According to Veikkolainen, cited by Yle, about two hundred earthquakes are recorded annually in Finland. For example, in September there were two earthquakes of magnitude less than 1 in Helsinki.

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Earthquakes of magnitude 1.7 and 2.6 have already occurred in the capital region in 2013 and 2011. Then tremors were felt in the cities of Espoo and Mäntsälä.