Magnitude 2.4 earthquake in Uithuizen, Groningen: “Spring and crackling”

Magnitude 2.4 earthquake in Uithuizen, Groningen: “Spring and crackling”

State Mine Monitoring (SodM) says on its website that earthquakes with a magnitude of 2.9 on the Richter scale almost never cause damage. But earthquakes caused by outgassing in Groningen cause much more damage because they are shallow and the soil in Groningen contains a lot of clay and peat. SodM said: “Natural earthquakes occur at a depth of ten kilometers, while earthquakes in Groningen occur at a depth of about 3 kilometers. Therefore, vibrations lose much less energy on their short path to Earth than natural earthquakes,” he explains.

Along the way, the vibrations can be amplified if the earth is stratified, explains the Regulator. This is the case, for example, if a seismic wave of sandy soil leads to much weaker clay or peat layers. “This so-called ‘fly effect’ causes extra damage in parts of the state of Groningen. It also causes a large difference in damage to buildings at relatively short distances.”

Source: RTL

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