PHIVOLCS
Hazard Maps
Jeffrey S. Perez Philippine Institute of Volcanology and Seismology
Department of Science and Technology
Training on Disaster Risk Reduction: The Role of DOST Regional Offices
Objective
• To know the different available hazard
maps at PHIVOLCS.
• To be familiarized with the contents of the
different hazard maps (scale, legend, etc.).
-For use in:
-- Evacuation
-- Emergency response
-- Rehabilitation
-- Planning location of settlements, facilities
(comprehensive land use and development
plans)
Hazard Maps
Volcanic Hazards
•Ashfall
•Lava flows
•Pyroclastic
flows
•Lahars
•Fissuring
•Tsunamis
•Debris avalanche,
landslide
Potentially damaging eruptive and post-eruptive phenomena
(Source: PHIVOLCS)
Volcano Hazard Maps Available
Banahaw Preliminary Lava Flow, Pyroclastic Flow, Lahar and
Flashflood (2004); Volcanic Hazard Map of the Banahaw
Volcanic Complex (San Cristobal, Banahaw, Banahaw de
Lucban): READY Project 2008
Bulusan Lahar (2007); Lava, Pyroclastic Flow and Surge (2000)
Cabalian Lahar and Pyroclastic Flow and Surge (READY Project:
2007)
Cagua Preliminary Hazard Zonation Map of Cagua Volcano (1996)
Canlaon Extent of Ashfalls, Lava Flow, Pyroclastic Flow and Lahar
(2012)
Hibok-
Hibok
Proclastic Flows and Lateral Blasts, Lava Flows, Lahars and
Floods, Airfall Tephra and Ballistic Projectiles and Hazard
Zonation Map (1987)
Volcano Hazard Maps Available
Iraya Preliminary Hazard Map (Lava Flow and Pyroclastic Flow of
Iraya Volcano (1998)
Iriga Preliminary Hazard Map of Iriga Volcano (1995)
Mahagnao Lahar and Pyrocalstic Flows and Surges (READY Poject:
2007)
Mayon Ashfall and Lava Flow (2000); Pyroclastic Flow (2003);
Lahar (2010)
Matutum Preliminary Hazard Map (Lahar and Pyroclastic Flows) 1998
Parker Preliminary Hazard Map (Lahar and Pyroclastic Flows) 1999
Pinatubo Lahar and Flood Hazard Maps (2004; READY Project 2008
and 2010)
Taal Ballistic Projectiles, Base Surge, Seiches/Lakewater
Oscillation and Fissuring (2011)
Volcanic Hazard Maps: Some Examples
Pinatubo lahar hazard map
Taal pyroclastic flow (base
surge) hazard map
Mayon Volcano
Lava Flow Hazard Maps
Mayon Volcano
Lava Flow Hazard Maps
Earthquake-related Hazards
Tsunami Fire
Fault (Ground) Rupture
Ground Shaking –
Collapse of Building Liquefaction
Landslide
Distribution of Active
Faults and Trenches
in the Philippines
Active Faults Map
1:250,000
Active Faults Map
1:50,000
1:5,000
Ground Shaking Hazard Map
Leyte
Southern Leyte
Northern Samar
Eastern
Samar
Liquefaction Hazard Map
Leyte
Southern Leyte
Northern Samar
Eastern
Samar
Earthquake-induced
Hazard Map Leyte
Southern Leyte
Northern Samar
Eastern Samar
Tsunami Prone Areas
in the Philippines
Tsunami Hazard Map Leyte
Southern Leyte
Northern Samar
Eastern
Samar
Tsunami Hazard Maps
• Familiarization with
the features and
elements of the
tsunami hazard map
• Gain working
knowledge in how to
use the hazard map
• Be able to identify
possible evacuation
sites
Learning Activity
Dumalinao
Pagadian City
Labangan
Tukuran
Groupings
• Group 1: Charmaine
CAR, I, II, III
• Group 2: Lucille
NCR, VII, IV-A, IV-B, V
• Group 3: Melcario
IX, X, XI, XII, CARAGA
Activities • Locate elements at risk (schools, hospitals,
etc.) in the map
• Identify the possible maximum tsunami
wave height in the map
• Identify the maximum extent of tsunami
inundation from the shoreline in the map.
• Determine possible evacaution sites in the
map.
Contact Us:
http://www.phivolcs.dost.gov.ph
/phivolcs_dost
Philippine Institute of Volcanology and Seismology (PHIVOLCS-DOST)
Earthquake & Tsunami (24/7):
Tel. Numbers
• +632 929-9254
• +632 426-1468 loc 124 / 125
Fax number
• +632 927-1087
Volcano (24/7):
Tel. Numbers
• +632 426-1468 loc 127
Telefax number
• +632 927-1095
IEC materials:
• +632 426-1468 loc 128
• +632 927-4524