bnn.lv Latviski   bnn-news.com English   bnn-news.ru По-русски
Tuesday 17.07.2018 | Name days: Aleksejs, Aleksis

Strongest earthquakes in Baltic region in the past 40 years

FaceBook
Twitter
Draugiem
print
(No Ratings Yet)

Baltic news, News from Latvia, BNN.LV, BNN-NEWS.COM, BNN-NEWS.RUAn earthquake was registered in Estonia near Lake Võrtsjärv at 02:50 Greenwich Mean Time on 12 November this year. This earthquake was picked up by Baltic Virtual Seismic Network.

Earthquakes are a result of tectonic movements in the Earth’s crust. There is a decent amount of tectonic cracks in the Earth’s crust below the Baltics. For example, the Liepaja-Riga-Pleskava tectonic zone extends through Latvia’s territory from the south-west to the north-east from Liepaja to Valmiera and continues further to the east towards Pleskava.

But earthquakes can only appear if cracks are active. At the same time, it should be said that the overall activity of modern tectonic plates is not well-researched. A tectonic earthquake is a sign of an active tectonic crack. To be able to accurately predict earthquakes, it would be best to organize an observation system or create a so-called geodynamic monitoring. This monitoring includes seismological monitoring, water level and temperature measurements in boreholes and measurements of underground movements below the surface of the Earth, explains seismologist of Latvian Environment, Geology and Meteorology Centre Valery Nikulin.

There is a network of GPS stations in Latvia – LatPos. It has a total of 25 GPS stations. This network is mainly used for geodetic and cartographic purposes. But there is a possibility this network can be used for research of geodynamic movements.

According to historic data, there were three earthquakes near Lake Võrtsjärv in 1987. This information was acquired as a result of macro-seismic research. Earthquake intensity ranged within III-IV based on MSK-64 scale. There was another earthquake in the area even earlier – in 1823. Its intensity was IV-V based on MSK-64 scale. This makes Lake Võrtsjärv a relatively active seismic region.

Latvia has only one seismological station – Slitere. It is located in Dundaga. The station was opened in October 2006, it actively cooperates with Latvian State Environment, Geology and Meteorology Centre and Germany’s Earth Sciences Research Centre, located in Potsdam. GFZ helps coordinate international, global seismological monitoring network GEOFON. Cooperation with GFZ helps exchange data from other seismological monitoring stations in the Baltic region – Finland, Estonia, Lithuania, Poland, Denmark and Russia. This forms Baltic Virtual Seismic Network.

A total of 372 seismic events have been registered in the Baltic region over the course of 2016. 35 of those seismic events took place in Latvia, on the border between Latvia and Estonia and in the coastal area of the Baltic Sea. It is possible that there may have been more seismic events. Unfortunately, the range of BVSN is small, with an average coverage of 180 km for each station. The background of small seismic noises does not allow specialists identify weak seismic events, the specialist explains.

The last registered tectonic earthquake took place in Estonia, Pernava in February 2013. Its magnitude was modest – 1.1.

The small magnitudes of earthquakes commonly registered in the Baltic region may suggest that the Baltic region is a peaceful region. Nevertheless, it is important to remind of the most powerful earthquakes that took place in the regions in the past 40 years.

For example, an earthquake with a magnitude of 4.7 took place on Osmussaar Island in Estonia. After this earthquake, there had also been three weaker earthquakes or aftershocks.

In September 2004, two powerful earthquakes were registered in Kaliningrad with magnitudes of 5.0 and 5.2. Intensity of the earthquake reached 6-6.5 based on EMS-98 scale (modern counterpart of MSK-64 scale) in the epicenter. Kaliningrad earthquake had damaged 2,100 buildings, including schools and kindergartens, 20 people were seriously injured and one person died. Total losses reached USD 5.1 million.

Residents of Riga felt an earthquake in November 2010. Based on survey data and eyewitness reports, specialists concluded that tectonic shocks were caused by movement in Olaine-Incukalns and Bergu tectonic zone. Because Slitere seismological observation station is located 140 km away from the epicenter, it was not possible to isolate and identify the underground shock from regular seismic noise.

With that, the Baltic region has a relatively small seismic activity. Nevertheless, powerful earthquakes remain a possibility for the region.

Ref: 102.109.109.6081


Leave a reply

  1. Linda says:

    Must be the Russian moles coming up for air!

Rezekne Council deputies will not be penalized for releasing newspaper in Russian language

The court has lifted fines previously applied by Corruption Prevention and Combating Bureau on nine deputies of Rezekne City Council for releasing a newspaper produced by the council in Russian language in addition to Latvian.

Volume of imported petrol in Latvia down 2% in five months

The volume of motor fuel imported to Latvia in the first five months has declined 2% in comparison with the same period of 2017. The volume of diesel fuel has declined 14.9%.

Corruption watchdog ends case about Bi-2 concert in Riga

Corruption Prevention and Combating Bureau ended in May the case regarding possible misuse of administrative resources on pre-election promotion by Riga City Council in the form of a free Bi-2 concert in Lucavsala.

Thailand's rescued boys honour casualty of 17-day rescue operation

In Thailand, a 12 boys trapped in a cave have been rescued in a rescue operation that lasted for 17 days and ended with one casualty, a rescue diver.

Latvian political party Progresīvie to nominate women as candidate list leaders

Latvia political party Progresīvie has revealed its list of candidates for 13th Saeima elections. Five women have been stated as leaders of candidate lists.

Estonia earns 150 000 euros from military evaders annually

Estonian compulsory military service is evaded by about 1 000 young men each year, who have to pay fines that annually exceed the combined total of 150 000 euros.

Chairman: FCMC’s competence should end with termination of licenses if banks are liquidated

In the event of liquidation or insolvency, Finance and Capital Market Commission’s competence should end with revoking affected banks’ license and without the need to appoint an administrator, says FCMC chairman Pēters Putniņš.

Minister: Latvia may terminate MPC system in the next three years

In the next three years or so Latvia could completely terminate the mandatory procurement component system, said Economy Minister Arvils Ašeradens in an interview to Rīta Panorāma programme of LTV.

In pictures: French victory in World Cup celebrated by tens of thousands in Paris

After the football World Cup was won by the French national team on Sunday, an enormous crowd of people gathered in central Paris to celebrate.

Another case of African swine fever infection recorded for domestic pigs in Latvia

African swine fever infection was recorded for domestic pigs in Tērvete on Monday, 16 July. 16 pigs were liquidated because of the infection, as reported by Food and Veterinary Service.

MEP Artis Pabriks becomes political party «Attīstībai/Par!» prime minister candidate

Latvian political party «Attīstībai/Par!» has picked Daniels Pavļuts, Juris Pūce, Ilze Viņķele, Artis Pabriks and Mārtiņš Bondars as its regional candidate list leaders. Artis Pabriks will also be the party’s prime minister candidate.

Russian-U.S. presidents meet in Helsinki

U.S. President Donald Trump and Russian President Vladimir Putin are meeting on Monday in Helsinki.

Heat of up to +30° C expected in Latvia this week

Weather in Latvia will be warm and even hot at times this week, as air temperature reaches up to +30° C. At night, air temperature is not expected to go below +20° C. Many regions will likely experience thunderstorms closer to the middle of the week, Environment, Geology and Meteorology Centre reports.

Week in Lithuania. Lithuania's Tripartite Council fails to reach agreement

Lithuania's Tripartite Council on Tuesday, July 10, failed to reach agreement on raising the minimum wage. Employers are inclined to back the government's proposal to raise the minimum pay to 420 euros. Meanwhile, trade unions want it increased to 450 euros.

BNN summary of the week: NATO to increase and ABLV Bank loses its license

BNN offers a summary of this week’s topical news in a variety of categories: Future; Deal; Fight; Decline; Decision; Opinion.

SEB Bank to unite life insurance companies working in Baltic States

SEB Bank will unite life insurance companies working in Baltic States, BNN was told by SEB Bank’s representative Agnese Strazda.

Saeima deputy Askolds Kļaviņš becomes suspect in criminal case

Saeima deputy from the Union of Greens and Farmers Askolds Kļaviņš has been made a suspect in the criminal case regarding abuse of official power.

Minister: E-health system has stabilized, but improvements are still needed

Functionality of the E-health portal has stabilized. Disconnection errors have ceased. Nevertheless, we have to continue improving the system further, said Latvian Healthcare Minister Anda Čakša said in an interview to Rīta panorama programme of LTV.

Six to eight Finance and Capital Market Commission officials may work at ABLV Bank

Six to eight FCMC trusties may work at the liquidated ABLV Bank, says Finance and Capital Market Commission chairman Pēters Putniņš.

Latvia’s Cabinet of Ministers receives expanded draft on deposit system

Environment Protection and Regional Development Ministry has submitted to the Cabinet of Ministers an expanded legislative draft regarding amendments to the Packaging Law and Environment Protection Law for their review in the State Chancellery, as confirmed by the ministry’s representatives.

Latvia will not escape talks on increasing defence spending

It is necessary to develop Latvia’s defensive capabilities. Because of that, Latvia cannot escape talks on increasing defence spending to more than 2% of GDP, said Defence Minister Raimonds Bergmanis, who is participating in the NATO summit in Brussels.

Russia extends food product embargo until end of next year

On Thursday, 12 July, Russian President Vladimir Putin decided to extend the embargo on food product imports from countries of the European Union and other countries until the end of next year.

Heat in Latvia to remain for longer; thunderstorms and heavy rain expected, as well

Next week in Latvia will be appropriately hot for summer, as air temperature is expected to reach +30° C at times. Nevertheless, most of Latvia will experience rain and thunderstorms, as reported by State Environment, Geology and Meteorology Centre.

US President announces «tremendous amount of progress» in defence spending matter

On Thursday, 12 July, US President Donald Trump announced having achieved a great deal of progress in the NATO member states’ defence spending matter during the summit.

Providus: it is impossible for Latvian parties to attract large funding honestly

«If we look at political parties’ ability to attract funding from large companies, for example, conclusions are rather sad – there is no way for parties in Latvia to attract funding in an honest way,» Providus think tank researcher Iveta Kažoka said in an interview to BNN.

Newest comments