The Beirut explosion – like an earthquake – is news in Israel

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איור הגלים הסיסמיים על פי מרחק וזמן

Illustration of seismic waves by distance and timePhoto: The Geological Survey

The violent explosion that terrified Beirut, the capital of Lebanon yesterday (Tuesday) in the afternoon, was well received in the measuring instruments of the Geological Survey of Israel, which engages in geological research and earthquake monitoring throughout the year.

A post posted on the institute’s Facebook page stated that “the explosion in Beirut was well received at seismic stations throughout the country. The explosion emitted energy equivalent to an earthquake with a magnitude of 3.5 (torque magnitude).”

The institute presented the seismic waves as recorded at the seismic network stations as a result of the explosion in the port of Beirut (pictured above). The vertical axis is the time that begins 5 seconds after the explosion. The horizontal axis is the distance between the station and the explosion.

Also in the illustration you can see the map of the stations (green triangles) and the place of the explosion (red star).

We also noted at the institute that this is not the only place where the explosion can be detected, in the figure below you can see the effect of the explosion on the pressure in the groundwater and the change in water level in Goma 1 drilling (near Kiryat Shmona) located at a depth of 500 meters.

Groundwater pressure in Goma drilling
Photo: The Geological Survey

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