What is an earthquake swarm ?
An earthquake swarm is a sequence of seismic events in particular region on a time .earthquake swarm are very small earthquakes activities the are also called micro earthquakes.
Earthquake swarms are common in volcanic regions, where they are often associated with magma movement or hydrothermal activity. They can also occur in other areas, such as along tectonic plate boundaries or in regions with active faults.
Causes of earthquake swarm .
Magma movement: Swarms can be caused by the movement of magma beneath the surface of the Earth. As the magma moves, it can put pressure on the surrounding rocks, causing them to break and slip. This can lead to a series of small earthquakes.
Hydrothermal activity: Hydrothermal systems are areas where hot water and steam circulate through the rocks beneath the Earth’s surface. This can weaken the rocks and make them more likely to break, leading to earthquakes.
Stress changes: Swarms can also be caused by changes in stress on the Earth’s crust. For example, the stress on the crust can change due to the movement of tectonic plates or the removal of groundwater.
It is very difficulies that Earthquake swarms can be predict, but it is not always possible to say whether a swarm will lead to a larger earthquake. Monitoring swarms can help to better understand the seismicity of a region and to identify potential areas of risk.
There are examples of earthquake swarms in world:
The 1989 Loma Prieta earthquake in California was preceded by a swarm of earthquakes.
The 2011 Tohoku earthquake in Japan was also preceded by a swarm of earthquakes.
In 2021, a swarm of earthquakes occurred in Oklahoma City, Oklahoma. The swarm lasted for several months and caused widespread damage.
In India deccan trap also is under effect of earthquake swarm.
Last few days ago , earthquake swarm is happened in iceland .
What should be done in earthquake swarms region ?
Some steps should be taken
1.population evacuation
2.To develop advanced scientific infrastructure
3.Prohibiting the settlement of people in such areas
4.Making multi-level communication arrangements in the affected areas