History, Hazards, and Alert Levels As of 13 Feb 2020

Eruption History Hazard scenarios Alert levels

MARAGONDON

Volcanic Explosivity CITY CITY OF CALAMBA SILANG Background, quiet BaseGENERAL EMILIO su AGUINrALDOge L A G U N A AMADEO Year MAGALLANES Index (VEI) Deaths LOS BAÑOS

Top ALFONSO MENDEZ 0

TAGAYTAY CITY TALISAY 1572 Confirmed view C A V I T E BAY CITY OF TANAUAN SANTO TOMAS 1591 LAUREL TUY ALAMINOS 1605 Uncertain BALETE No eruption in foreseeable future.

SAN PABLO CITY 1606 CALACA AGONCILLO SAN PABLO CITY

LEMERY TIAONG 1607 LIPA CITY SAN ANTONIO Low level seismicity, fumarolic, other activity SAN NICOLAS CUENCA 1 1608 TAAL SAN JOSE SANTA TERESITA 1609 B A T A N G A S SAN LUIS ROSARIO SAN PASCUAL CITY (Capital) 1610 Side

view Magmatic, tectonic or hydrothermal 1611 disturbance; no eruption imminent.

Tagaytay 1634 Cuenca

1635 Low to moderate level of seismicity, persistence of local but unfelt earthquakes. Ground deformation measurements above 2 baseline levels. Increased water and/or ground probe hole 1641 temperatures, increased bubbling at Crater Lake.

1645 MARAGONDON

CABUYAO CITY CITY OF CALAMBA Ballistic projectilesINDANG SILANG L A G U N A GENERAL EMILIO AGUINALDO AMADEO 1707 MAGALLANES LOS BAÑOS Top ALFONSO MENDEZ TAGAYTAY CITY TALISAY 1709 C A V I T E BAY

view CITY OF TANAUAN NASUGBU CALAUAN SANTO TOMAS

1715 A) Probable magmatic B) If trend shows further LAUREL TUY ALAMINOS intrusion; could eventually decline, volcano may soon 1716 MALVAR lead to an eruption. go to level 1 BALETE BALAYAN

SAN PABLO CITY

1729 CALACA MATAASNAKAHOY AGONCILLO SAN PABLO CITY

LEMERY TIAONG 1731 LIPA CITY SAN ANTONIO SAN NICOLAS Relatively high unrest manifested by seismic swarms including CUENCA 1749 3 increasing occurrence of low frequency earthquakes and/or TAAL harmonic tremor (some events felt). Sudden or increasing SAN JOSE PADRE GARCIA SANTA TERESITA changes in temperature or bubbling activity or radom gas ALITAGTAG emission or crater lake pH. Bulging of the edifice and fissuring 12 B A T A N G A S 1754 may accompany seismicity. SAN LUIS IBAAN ROSARIO SAN PASCUAL BAUAN (Capital) 1790 Side 1808 view

1825

1842

1873 A) If trend is one of increas- B) If trend is one of decreas- ing unrest, hazardous erup- ing unrest, volcano may tion is possible within days soon go to level 2 1874 to weeks.

MARAGONDON

Volcano tsunami CABUYAO CITY CITY OF CALAMBA 1878 INDANG SILANG L A G U N A GENERAL EMILIO AGUINALDO AMADEO MAGALLANES LOS BAÑOS Intense unrest, 1903 Top ALFONSO MENDEZ TAGAYTAY CITY continuing seismic TALISAY view C A V I T E BAY 4 swarms, including CITY OF TANAUAN NASUGBU CALAUAN harmonic tremor 1904 SANTO TOMAS and/or “low frequency earthquakes” which are LAUREL TUY 1911 1335 ALAMINOS usually felt, profuse MALVAR steaming along existing BALETE and perhaps new vents BALAYAN 1965 355 and fissures. SAN PABLO CITY

CALACA MATAASNAKAHOY AGONCILLO SAN PABLO CITY 1966 LEMERY TIAONG Hazardous eruption is LIPA CITY possible within days.

SAN ANTONIO SAN NICOLAS 1967 CUENCA

TAAL SAN JOSE PADRE GARCIA SANTA TERESITA 1968 ALITAGTAG B A T A N G A S Base surges accompanied SAN LUIS IBAAN ROSARIO SAN PASCUAL by eruption columns or lava BAUAN BATANGAS CITY (Capital) 5 1969 fountaining or lava flows. Side 1970 view 1976

Hazardous eruption in 1977 progress. Extreme hazards to communities 2020 west of the volcano and Source: “A synthesis and review of ashfalls on downwind historical eruptions of Taal Volcano, sectors. Southern Luzon, Philippines”, Delos Reyes, Bornas, Dominey-Howes, 0 1 2 3 4 5 Pidlaoan, Magill, Solidum. Sources: PHIVOLCS Sources: PHIVOLCS

The boundaries and names shown and the designations used on this map do not imply official endorsement or acceptance by the United Nations. Creation date: 13 Feb 2020 Sources: PHIVOLCS, PSA, NAMRIA Feedback: [email protected] www.unocha.org www.reliefweb.int