The 2018 Sulawesi Island, Indonesia Earthquake: Crustal deformation detected by ALOS-2 data

An earthquake (Mw 7.5, USGS) occurred in Sulawesi island, Indonesia on September 28, 2018 (UTC). To measure the crustal deformation caused by this earthquake, we applied interferometric analysis using ALOS-2/PALSAR-2 data. The analysis result shows that the crustal deformation occurred in the part of the island.

Fig.1 SAR interferogram [PNG: 1.4MB]

Multiple Aperture Interferometry
Fig.2MAI [PNG: 0.7MB]

Fig. #	Date	Time (UTC)	Flight Dir.	Beam Dir.	Obs. Mode*1	Incidence Angle (around epicenter)	Bperp
1	2018年08月24日 2018年10月02日	03:47	Des.	Right	W-W	29°	+43m

*1 W: ScanSAR (Normal)
(cf. ALOS-2 Project / PALSAR-2 (JAXA))

Analysis by GSI from ALOS-2data of JAXA.
These results were obtained through the activity of the SAR analysis working group of the Coordinating Committee for Earthquake Prediction.

Date-Time	September 28, 2018, 10:02(UTC)
Hypocenter Location	0.178°S、119.840°E、Depth:10.0 km (USGS, as of October 4, 2018)
Magnitude	Mw=7.5(USGS, as of October 4, 2018)

ALOS-2 (Advanced Land Observing Satellite 2) launched by Japan Aerospace Exploration Agency on May 24, 2014

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YARAI Hiroshi: Head of Division
KOBAYASHI Tomokazu: Chief Researcher

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• M7.5 - 78kmN of Palu, Indonesia (USGS)