An earthquake in the Mysłowice Wesoła mine with a magnitude of 2.3 M. Miners removed

Author: PG Silesia

Residents of Katowice, Mysłowice and Sosnowiec felt a very strong tremor overnight from Friday to Saturday. Shortly after midnight, houses shook in the vast area of ​​the Silesian metropolis of Zagłębie. The 2.3 M magnitude shock was the result of stress relief resulting from mining at the Mysłowice Wesoła mine.

Strong shock in Silesia

A very strong tremor occurred on Friday evening in Silesia. It was very disturbing with houses in a wide area from Mysłowice and Imielin through Sosnowiec and Katowice to Tychy. The shock was so strong that it was recorded by seismic stations across Europe. According to data obtained from the Polish Academy of Sciences, it was a strong shock with a magnitude of 2.3 M. The epicenter of the shock was located at a depth of 2 km in the Mysłowice Wesoła mine.

– The shock occurred in the area of ​​the 579 longwall in the 510 vein of the Mysłowice Wesoła mine. The crew was fine, no one was injured. The wall returned to extraction in the morning, informs Tomasz Głogowski, spokesman for Polska Grupa Górnicza.

Strong shock in Katowice, Mysłowice and Sosnowiec

The inhabitants of many cities felt very violent shocks. Most of them were already asleep and were awakened in the middle of the night by very unpleasant sensations.

– Sosnowiec center on the 9th floor. So it hasn’t bothered me yet. 7-8 seconds as in the case of sharp braking – informs one of the readers.

– On Wesoła very long and hard. This is probably the longest and strongest shock. On a gelynder cage I think about a madman for 10 minutes – writes another reader.

= Mysłowice Bończyk also strongly. It’s the husband down in Wesoła who does – the Reader informed anxiously.

– Typical hours. The 0.04 tipped over once, but so firmly it was a shock! – informs the Reader.

Shock at the Mysłowice Wesoła mine. See the seismograph recording

Upheavals in Silesia

A very strong shock in the mine, which was felt by the inhabitants of the mine from Friday to Saturday, did not result in damage to the mine. So far, there is no information on the threat to miners or damage to infrastructure.

Tremors with a magnitude greater than 2 degrees are classified as high-energy – the strongest, which are recorded in Silesia. A stronger shock, with a magnitude of more than 3.2 degrees, was recorded a week and a half ago at the Bielszowice mine in Ruda Śląska. Even then, no miners were injured, but the morning shock woke residents of several Upper Silesian towns.

The strongest shocks caused by mining operations are related to the equalization of stresses in the ground caused by the cumulative effects of mining and natural stresses. They mainly occur where there are tectonic faults. In Poland, all of the mining of copper ore and about 70 percent. Coal mining is carried out under conditions of risk of ground bursting, that is to say underground tremors, causing damage to sites or on the surface.

The most common cause of tremors is the relaxation of the rock mass following coal mining, which results in the release of energy stored in the rock mass. Due to the different geological conditions, some tremors are strongly felt on the surface, others less so. Most of them do not pose a direct threat to miners and residents of mining areas. Besides methane and coal dust explosions, rockbursts are the most common causes of mining accidents.

In April this year, 10 miners died at the Zofiówka mine in Jastrzębie-Zdrój as a result of a violent shock and the release of a large amount of methane. A few days earlier, at the Pniówek mine in Pawłowice, methane explosions had killed 16 people – 7 of whom are still underground – behind the dam, which – for safety reasons – was isolated from other work sites. PORRIDGE

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