Impact of Earthquakes: Liquefaction
The Lombok earthquake with M7.0 which occurred on Sunday, August 5, 2018, at 18:45:35 WIB, has caused tremendous damage and victims in North and East Lombok and the surrounding area. The two regions that were previously on July 29, 2018 have been shaken by earthquakes with the strength of M6.4.
The collapse of buildings that cause many victims is caused by earthquake shocks, surface rupture (soil cracks) and dangers that follow, in this case liquefaction or soil leaching.
The phenomenon of liquefaction or soil leaching or in English is called soil liquefaction is a process that makes the soil lose its strength quickly due to the vibrations caused by earthquakes strong in fine-grained and water-saturated soil conditions. And there is a weak zone that results in surface. The manifestations on the surface are usually in the form of fine-grained sand sludge coming out of the soil cracks. Sometimes water wells disappear and change sand.
The phenomenon of liquefaction that occurred on the island of Lombok was caused by an earthquake with M7.0 and was not directly related to the activities of Mount Rinjani.
Source: Center for Volcanology and Geological Disaster Mitigation, Geological Agency, Ministry of Energy and Mineral Resources