Peak Ground Velocity (PGV) estimation of Mw 5.6 Cianjur earthquake November 11th, 2022 using Global Positioning System (GPS)
Susilo Susilo (a*), Irwan Meilano (b), Sidik Tri Wibowo (c)

a) Research Center for Geospatial, National Research and Innovation Agency, Indonesia
* susilo.2[at]brin.go.id
b) Faculty of Earth Science and Technology, Institute of Technology Bandung (ITB), Indonesia
c) Center for Geodetic Control Network and Geodynamic, Geospatial Information Agency, Indonesia

Abstract

The primary purpose of GPS is to be used for positioning, navigation, and timing (PNT). In the last decade, research on GPS for earthquake hazards has increased rapidly, such as for tectonic deformation, GPS seismology, modeling earthquake source parameters, estimation of magnitude, etc. In this study, following the Mw 5.6 Cianjur earthquake on November 11th, 2022, we estimate the peak ground velocity from the CJUR GPS station, which is located about 5 km from the epicenter. We compute GPS velocity from the high-rate GPS receiver independent exchange (RINEX) data and broadcast ephemeris. Using a narrow line combination of L1 and L2 observations, we invert velocity epoch by epoch. The result shows the CJUR GPS station has a peak ground velocity of about 11.5 cm/s and equal to VI MMI scale. The peak ground velocity from the GPS station could be important for deriving the earthquake shakemap. By increasing the number of GPS stations in Indonesia, it is very important to support earthquake hazard monitoring.

Keywords: PGV, GPS, earthquake, Cianjur

Topic: Solid Earth Sciences