Geoinformatics Unit

Preliminary Analysis of the Mw6.1 Luzon Earthquake Using ALOS-2 Data

May 7, 2019

On 22 April 2019, an M 6.1 earthquake struck the Philippines at 5:11 pm (local time). According to the United States Geological Survey (USGS), the revised depth of the event was 20 km and urban damages were reported from several regions such as Bataan, Pampanga, and Manila. Geoinformatics Unit at RIKEN AIP performed SAR data analysis in collaboration with JAXA for a voluntary Sentinel Asia program.

(1): RGB color composite map of the affected area
R band: 2019.04.02 HV
G band: 2019.04.02 HH
B: band: 2019.04.30 HH

(2): Synthetic aperture radar interferometry (InSAR) was carried out over the Philippines to investigate tectonic and non-tectonic deformations using the two PALSAR-2 images (HH mode). Each fringe is approximately 12 cm displacement in line of sight of the satellite.

(3) and (4): Unwrapped deformation map and nonlinear modeling on a fault plane with SW-NE orientation was applied using initial faulting information from Global CMT catalog.

Further Information

Sentinel Asia LINK


The information contained in the map is for general information purposes only. The accuracy of the analysis is not assessed yet. The information is provided by Geoinformatics Unit and while we endeavor to keep the information up to date and correct, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with respect to the map or the information, products, services, or related graphics contained on it for any purpose. Any reliance you place on such information is therefore strictly at your own risk.