Robin Lacassin @RobinLacassin@qoto.org

According to posts on twitter, there are significant damages and at least 2 fatalities after a moderate magnitude M5.6 #earthquake in western Java island, Indonesia. Inland shallow fault rupture, close to towns, likely explain the destructions.

RT 👇🏼 https://twitter.com/BNPB_Indonesia/status/1594596756205244418?s=20&t=N0QFeOPMmCQp1ReAfiCnjw
and
https://twitter.com/pamumpuni/status/1594599955037028354?s=20&t=N0QFeOPMmCQp1ReAfiCnjw

A magnitude Mw6.9 #earthquake offshore south-central #Sumatra.

Mechanism and location suggest rupture on the shallow part of the #subduction #megathrust close to the trench (on the very shallow dipping fault plane). However, modelled depth of ~19km, if true, seems little too deep given the closeness with the trench (USGS gives same depth and mechanism). This means that we cannot exclude a rupture on the steep fault plane within the oceanic plate.

Map with source time function from Geoscope IPGP
http://geoscope.ipgp.fr/index.php/en/catalog/earthquake-description?seis=us7000iqpn
Larger map with epicenter of this event in red from USGS (both not yet on fediverse it seems)

I'm senior researcher at #CNRS (Centre National de la Recherche Scientifique) and #IPGP (Institut de Physique du Globe de Paris).
http://www.ipgp.fr/~lacassin

Working on #geology, #earthquake and sometimes #volcanic processes, related #hazards and risks, science communication…

I'm executive editor at TEKTONIKA https://twitter.com/WeAreTektonika (a DOA journal not yet on Mastodon), and advocate of #openscience, free #openaccess

Just moving from Twitter to Mastodon, and learning how to use it. Will keep the two accounts alive, at least for some time…