We know Estonia
3.7.2022 | Estonia

Second earthquake in two weeks hits of north-western coast of Estonia

Text Mark Taylor
Photos Estonian Geological Survey

Second earthquake in two weeks hits of north-western coast of Estonia

 

According to the Finnish and Estonian Seismic Monitoring System, a 1.4 magnitude earthquake was recorded in Alliklepa Bay, west of the Pakri Islands in Harjumaa, on Tuesday June 28. This is the second earthquake in this location in the past two weeks. A 2.3 magnitude quake struck the same location on June 13.

“Earthquakes can occur in a series, during which a larger event can be preceded by smaller foreshocks or followed by aftershocks. Such cases have rarely been observed in Estonia,” explained Heidi Soosalu, a seismologist at the Estonian Geological Survey.

Tuesday’s 1.4 magnitude earthquake was 22 times smaller than the one recorded on June 13, which registered 2.3 on the Eathquake Magnitude Scale. The depth of both events is estimated at approximately 4 km. This is a typical depth level for Estonian earthquakes,” said Soosalu .

“Although negligible in global context, this seismic activity is worth noting on the Estonian scale. We are located on old stable geological basement and earthquakes here are typically few, small and sporadic. They occur when old faults become activated in the regional stress field caused by global plate movements. In the Nordic-Baltic area the main factor is pushing from the Mid-Atlantic ridge between Eurasian and North American plates,“ Soosalu added.

Earthquakes under a magnitude of 2.5 can rarely be felt by people. However some locals did report hearing thunder-like sound during the first earthquake in early June. “Seismic waves are in fact acoustic waves propagating in the rock. They have low frequencies, typically <20 Hz. The higher end of seismic waves may be heard as thunder or banging,” Soosalu concludes.  

The largest earthquake recorded in Estonia was a 4.5 magnitude tremor close to the island of Osmussaar in western Estonia in 1976.

 

Source: ERR  

 

Alliklepa Bay

 

 

To learn more about this and similar topics
Alliklepa Earthquake Earthquake Estonia Estonian Geological Survey Finnish-Estonian seismic monitoring system Heidi Soosalu Pakri islands Paldiski

16.8.2022 | Estonia

This Saturday Pikk Herman Tower will be open to the public 

This Saturday Pikk Herman Tower will be open to the public 

This Saturday, August 20, 2022, marks the 31st anniversary of Estonia’s re-independance following the fall of the Soviet Union. … Read more

16.8.2022 | Estonia

Number of unemployed falls in second quarter of 2022

Number of unemployed falls in second quarter of 2022

According to the latest data from Statistics Estonia, in the second quarter of 2022, the unemployment rate fell to … Read more

15.8.2022 | Estonia

Foreigners living in Estonia are increasingly more highly educated than locals

Foreigners living in Estonia are increasingly more highly educated than locals

In a recent blog post by Statistics Estonia analysts Triinu Aug and Mirjam Jesmin. A deep dive into the … Read more

15.8.2022 | Estonia

Temperatures expected to hit 30°C this week

Temperatures expected to hit 30°C this week

The Estonian Weather Service has forecast temperatures of between 28-31°C all this week. As a result, the weather agency … Read more

14.8.2022 | Estonia

Over 50,000 Ukrainian refugees now in Estonia

Over 50,000 Ukrainian refugees now in Estonia

According to statistics from the Social Insurance Board, 50,347 refugees from Ukraine are now residing in Estonia. Since the … Read more

12.8.2022 | Estonia

Paide Opinion Festival begins today

Paide Opinion Festival begins today

Today sees the beginning of the 2-day Paide Arvamusfestival (Opinion Festival). The festival, which is celebrating its 10th edition, … Read more

11.8.2022 | Estonia

Estonia’s tax revenues up 16% in first half of 2022

Estonia’s tax revenues up 16% in first half of 2022

In the first half of 2022, Estonia’s tax revenues rose by 15.9 per cent to 5.62 billion euros. In … Read more

10.8.2022 | Estonia

Foreign tourists spent €320 million in Estonia in the second quarter of 2022

Foreign tourists spent €320 million in Estonia in the second quarter of 2022

According to data from Eesti Bank, foreign tourists spent a total of €320 million euros in Estonia in the … Read more