There are observations of emission of unusual smoke coming from Pinatubo Volcano and/or immediate vicinities and poor to zero visibilities from ash fall reported to DOST- PHIVOLCS by concerned citizens of Brgy. Santa Fe, San Marcelino and Sitios Yangil and Banawen, San Felipe in the province of Zambales and also in Brgy. Nabuclod, Floridablanca and Brgys. Inararo and Camias, Porac in the province of Pampanga. The observations were reported after the occurrence of the M6.1 earthquake on April 22, 2019. Hence, these raised concerns on the earthquakes effects on Mt. Pinatubo.
DOST-PHIVOLCS is closely monitoring Pinatubo Volcano. So far, the Pinatubo Volcano Seismic Monitoring network has not detected any changes in the condition of the volcano after the occurrence of the M6.1 earthquake that may indicate any sign of volcanic unrest.
Based on the account of our colleagues who were conducting fieldwork inside the crater when the earthquake occurred, there is no steaming activity before, during, and after the earthquake. The reported steaming and other related observations are dust clouds generated by rockslides, which were subsequently blown by the wind. These rockslides resulted from the strong ground shaking produced by the M6.1 earthquake and succeeding aftershocks. The generation of dust clouds was verified by PHIVOLCS Quick Response Team who went to Sitio Pasbul, Brgy. Camias, Porac, Pampanga on April 24, 2019.