DOST-PHIVOLCS Centroid Moment Tensor Catalog

The DOST-PHIVOLCS Centroid Moment Tensor (CMT) Catalog is a regional database of centroid moment tensor solutions for moderate to large earthquakes in the Philippines. These CMT solutions are resolved using SWIFT (Source parameter determination based on Waveform Inversion of Fourier Transformed seismograms), a method developed by Nakano et al. (2008) that performs frequency-domain waveform inversion to simultaneously estimate earthquake source mechanisms and moment functions. The method has been applied to data from the Philippine regional broadband seismic network, and was institutionalized and adopted at PHIVOLCS [Bonita et al. (2015); Punongbayan et al. (2015)] to enhance the understanding of local and regional seismicity. The catalog provides both near real-time and historical source parameters (2012-Present), serving as a valuable resource for seismic hazard assessment, earthquake response, and scientific research. https://swift1.phivolcs.dost.gov.ph/swiftdb