Analog-telemetered seismic network of short-period sensors installed by USGS Volcano Disaster Assistance Program in response to unrest at Pinatubo volcano in 1991, to help PHIVOLCS. The dataset comprises event waveforms (triggered by STA/LTA), phase arrivals, and instrument responses. Waveforms have been recently converted from SUDS format to MiniSEED, and are now stored in a Seisan database. There are no continuous digital waveform data, but some of the helical drum records have been scanned, and may be added too.