The South Cause Of The Island Of Java Often Occurs Earthquakes, Challenges The Active Megathrust Zone

YOGYAKARTA - An earthquake with a magnitude of 3.4 shook Pacitan, East Java, on Thursday 8 June. The shock that occurred in the early hours of the morning was felt in Ponorogo to Yogyakarta. The southern part of Java Island is indeed a tectonic earthquake subscription. What is the cause of the southern island of Java where earthquakes often occur?

The Meteorology, Climatology and Geophysics Agency (BMKG) said the 3.4 magnitude earthquake was centered in the sea 117 km southwest of Pacitan. The earthquake that shocked the people of East Java and DIY was followed by aftershocks 29 times.

Head of the BMKG Earthquake and Tsunami Center, Daryono, revealed that the earthquake that occurred in Pacitan was a feature of Interplate earthquake activity in the South Java Megathrust Zone. Many ask why earthquakes often occur in the south of Java Island?

The southern region of Java is often an earthquake because it is in a subduction zone or megathrust. Megathrust is a zone or place where Indo-Australian and Eurasian plates meet.

The megathrust zone is actually not only in the south of Java Island, but stretches from the tip of Sumatra to Bali, and Nusa Tenggara. The subduction zone is an area for the formation of volcanoes and earthquakes.

The areas in the south of Java that the earthquake paths through are quite active, namely Pacitan, Sukabumi, and Lebak. Pacitan is one of the areas that are subject to the earthquake because it is not only dealing with the Megathrust zone, but also located on the Grindu fault route.

In the south of Pacitan, earthquakes are often caused by rising faults in the plate collision zone. This earthquake often occurs in areas called accretion prism zones and bow-faced basins.

This is the review of the reason why the southern islands of Java often occur in earthquakes. Earthquake disasters often hit the southern region of Java because there is a Megathrust zone where Indo-Australian and Eurasian plates meet. Although BMKG can calculate the magnitude of the earthquake strength, there is no technology that can confirm when an earthquake will occur. Therefore, the public is asked to always be vigilant.

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