Taal Volcano, Philippines, is one of the world’s most dangerous volcanoes given its history of explosive eruptions and its close proximity to populated areas. A real-time broadband seismic network was recentlydeployedandhasdetectedvolcano-tectoniceventsbeneathTaal.Oursourcelocationanalysisofthese volcano-tectonic events, using onset arrival times and high-frequency seismic amplitudes, points to the existenceofa regionofstrongattenuationnear thegroundsurfacebeneaththeeast ?ankofVolcanoIslandin Taal Lake.Thisregionis beneaththeactive fumarolicarea andabovesourcesofpressure contributingin?ation and de?ation, and it coincides with a region of high electrical conductivity. The high-attenuation region matchesthatinferredfromanactive-seismicsurveyconductedatTaalin1993.Thesefeaturesstronglysuggest that the high-attenuation region represents an actively degassing magma body near the surface that has existed for more than 20years.