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