How to use HazardHunterPH
HazardHunterPH is the government's free tool for checking whether a place is prone to earthquake, volcano or weather hazards. You pick a point on the map and it produces a Hazard Assessment Report, with explanations and recommendations from PHIVOLCS, PAGASA and the Mines and Geosciences Bureau.
Open HazardHunterPH and follow along. This page is a guide to the tool and runs no checks itself.
Written for the Philippines. In an emergency here, the number is 911.
What it is
HazardHunterPH is a product of GeoRisk Philippines, a multi-agency initiative led by DOST-PHIVOLCS with DOST-PAGASA, DOST-ASTI, DENR-MGB, DENR-NAMRIA, the Office of Civil Defense and DepEd. The hazard information in it comes from the government agencies mandated for each hazard.
According to its FAQ, it can:
- tell you whether a location is prone to seismic, volcanic or hydro-meteorological hazards;
- generate a hazard assessment report with explanations and recommendations;
- show which areas of the Philippines are prone to each hazard;
- show how exposed schools, hospitals and roads are to each hazard.
The FAQ also says plainly that the reports it generates are free.
Source: GeoRiskPH, DOST-PHIVOLCS, About HazardHunterPH. Read 23 October 2026.
Source: GeoRiskPH, DOST-PHIVOLCS, HazardHunterPH Frequently Asked Questions. Read 23 October 2026.
How to check an address
The home page offers three ways to find a place: your current location, a search, or longitude and latitude typed in degrees, minutes and optional seconds.
Source: GeoRiskPH, DOST-PHIVOLCS, HazardHunterPH. Read 23 October 2026.
Running a check, step by step
The steps PHIVOLCS gives for generating a Hazard Assessment Report, which it says work the same way on the web and on the app.
- Open it
- Open hazardhunter.georisk.gov.ph in a phone or computer browser, or the HazardHunterPH app for Android.
- Find the place
- Use your current location, search for the place, or type its longitude and latitude.
- Pick the point
- Double-tap the spot on the map and wait. PHIVOLCS says the app takes about 15 seconds.
- Get the report
- Click the green button in the hazard assessment summary to open the Hazard Assessment Report.
Source: PHIVOLCS, Press release: Hazard Hunting Made Easier with HazardHunterPH Mobile. Read 23 October 2026.
To see a hazard drawn on the map, PHIVOLCS says to turn on its layer by ticking the box for that hazard.
What the report covers
The hazards the PHIVOLCS press release lists for the assessment, grouped the way it groups them, with the distance checks it describes and the agency each explanation comes from. Rain-induced landslides are added from the FAQ, which names the DENR-MGB rain-induced landslide and flood maps among those the tool uses.
Earthquake
DOST-PHIVOLCS
- Distance to the nearest active fault
- Ground rupture
- Ground shaking
- Liquefaction
- Earthquake-induced landslides
- Tsunami
Volcano
DOST-PHIVOLCS
- Distance to the nearest active volcano and its danger zone
- For selected active volcanoes: lava, lahars, pyroclastic density currents, ballistic projectiles, base surge and seiches
Weather
DOST-PAGASA and DENR-MGB
- Floods
- Rain-induced landslides
- Strong winds
- Storm surge
Source: PHIVOLCS, Press release: Hazard Hunting Made Easier with HazardHunterPH Mobile. Read 23 October 2026.
Source: GeoRiskPH, DOST-PHIVOLCS, HazardHunterPH Frequently Asked Questions. Read 23 October 2026.
What each of these hazards is, in the agencies' words, is on this site's earthquake hazards, volcanic hazards, flash flood and storm surge pages.
What the report is, and what it is for
The About page calls the reports indicative. The FAQ says a generated report may be used as a reference, and that an official document has to be requested from the agency concerned.
- For an official Hazard Assessment Report, the About page names DOST-PHIVOLCS, DOST-PAGASA and DENR-MGB, and says official documents may carry a fee to cover reproduction costs.
- For a report to submit to a bank or another government agency, PHIVOLCS takes requests at has.phivolcs.dost.gov.ph. It asks for a vicinity map and a copy of the TCT or Tax Declaration of the property, with your name, the name of any company involved, a contact number and the purpose of the request.
- For more detail on one hazard, the About page sends you to PHIVOLCS for seismic and volcanic hazards, to PAGASA for storm surge and severe wind, and to MGB for flood and rain-induced landslides.
Source: GeoRiskPH, DOST-PHIVOLCS, About HazardHunterPH. Read 23 October 2026.
Source: GeoRiskPH, DOST-PHIVOLCS, HazardHunterPH Frequently Asked Questions. Read 23 October 2026.
Source: PHIVOLCS, GIS Web Hazard Maps. Read 23 October 2026.
HazardHunterPH, FaultFinder and NOAH
The FAQ answers this itself.
- PHIVOLCS FaultFinder gives only the distance from an active fault. HazardHunterPH gives the distance from active faults and from volcanoes, then assesses the other hazards too. How to use FaultFinder is on the types of faults page.
- UP NOAH's maps are scenario-based models, which the FAQ says may be used for early warning. The MGB flood and rain-induced landslide maps and the PAGASA storm surge maps in HazardHunterPH are deterministic models, which may be used for long-term planning and development.
PHIVOLCS's earthquake and volcano hazard maps can also be downloaded as files that open in Google Earth, from its GIS site or from the Download Maps section of HazardHunterPH. If a municipality shows no map, PHIVOLCS says to try the provincial or regional level. If a province has none, it says either there is no hazard specific to the area or the mapping is still under way.
Source: GeoRiskPH, DOST-PHIVOLCS, HazardHunterPH Frequently Asked Questions. Read 23 October 2026.
Source: PHIVOLCS, GIS Web Hazard Maps. Read 23 October 2026.
Once you know what your address faces
Each hazard has a guide on this site with what the agency asks you to do before, during and after.
Floods and landslides Earthquakes Volcanic eruptions Evacuation plan template