Last Updated : October 5, 2018

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

Crustal Deformation Observed by Synthetic Aperture Radar (SAR)

Released: Oct. 5, 2018, updated: Oct. 5, 2018, Japanese version of this page

Summary

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.

SAR Interferograms


Fig.1 SAR interferogram [PNG: 1.4MB]


Fig.2 MAI [PNG: 0.7MB]
 
Fig.
#
Date Time
(UTC)
Flight
Dir.
Beam
Dir.
Obs.
Mode*1
Incidence Angle
(around epicenter)
Bperp
1 2018/08/24
2018/10/02
03:47 Des. Right W-W 29° +43m

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

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

The 2018 Sulawesi island Indonesia Earthquake

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)
              

Satellite

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

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Contact

YARAI Hiroshi : Head of Division
KOBAYASHI Tomokazu : Chief Researcher
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