Talk:1780 Java earthquake

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1780 Java Earthquake's source to not be Megathrust?

Latest comment: 1 year ago1 comment1 person in discussion

Stumbled upon this particularly new Wiki page and after some digging I found out that scientific papers such as Musson et al. (2012) and Harris & Major (2017) indicates it to be from the Baribis Fault, which might be similar to the 1699 Batavia event. This is further supported by the Indonesia’s Historical Earthquakes - Modelled examples for improving the national hazard map published by Nguyen et al. (2015), in which they modelled the 1699 scenario from 2 sources, Baribis Thrust Fault (M8, 120 km depth) and Sunda Subduction/Megathrust (M9, 10 km), and found the Baribis model to be more accurate in terms of intensity and damage, mirroring historical accounts.

The second model, the (notably similar) 1780 one, has 3 different scenarios that was tested and all of it is located inland, which are the Baribis (M7, 12 km), a crustal fault near Baribis (M7, 70 km), and an intermediate depth intraslab fault (M8, 160 km). The model then concludes that the first scenario, the Baribis one, matches more when compared to historical data.

That being said if what I am proposing is true, this could indicate that the Sunda Strait segment of the Sunda Megathrust has been inactive for far longer than the European Colonial era as there hasn't been any historical records of earthquakes that happened in Western Java that has any characteristics of being a Megathrust event that has been uncovered so far, which is unusual considering how quickly it is subducting and there hasn't been any major ruptures on that segment and is very scary if you remember how densely populated the region is.

I hope you can consider this discussion, @Victor3535. Thank you! 111.95.91.88 (talk) 13:02, 21 March 2023 (UTC)Reply

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