Interactive Hazard Map

Reads lat, lon and radius_km from the GET /assess endpoint. Authorize with an API key, click Try it out, enter a coordinate, then Execute (or click the map to set the point).

Map is inactive Expand GET /assess and click Try it out to enable the map.
Selected location
Earthquake (M5+)
Nearest fault line
Distance to fault
Nearest volcano
Cyclone track (in radius)
Search radius
Enable “Try it out” to plot.
Volcanic score reference

Dimensionless index. Range [0, 100 × W] — i.e. 0–100 for an Active volcano (W = 1.0) and 0–50 for a Potentially Active one (W = 0.5). Higher = greater relative exposure. Bands: 0–5 negligible · 5–25 low · 25–50 moderate · 50–75 high · 75–100 very high. Run a query to see the computation for your coordinate.

Pyroclastic Flow Score 0–100 × W · Primary
Pyroclastic-flow exposure. Flat within d_th = 6 km, then exponential decay.
Lava Flow Score 0–100 × W · Primary
Lava-flow exposure. Inverse-square decay (p = 2); high only near the vent.
Primary Hazard Score 0–100 × W · Composite
Near-vent, high-lethality exposure — mean of the two primary scores.
Ashfall Score 0–100 × W · Secondary
Ashfall exposure. Gaussian dispersion (σ = 15 km); relevant far out.
Lahar Score 0–100 × W · Secondary
Lahar exposure. Quadratic decay to exactly 0 past a cutoff (α = 0.008).
Secondary Hazard Score 0–100 × W · Composite
Distributed / downstream exposure — mean of the two secondary scores.
Final Volcanic Hazard Score 0–100 · Weighted
Weighted sum of the four components. The weights encode how much each contributes to overall volcanic risk:
Proximity 0.30Distance to the volcano — the strongest single driver of exposure, tied with primary hazards.
Primary 0.30Near-vent, high-lethality flows (pyroclastic, lava); weighted equally with proximity.
Secondary 0.20Distributed hazards (ashfall, lahar) that reach farther but are less immediately lethal.
Historical 0.20Eruption frequency over the last 100 years — likelihood rather than intensity.
Earthquake score reference

Dimensionless index, 0–100. Higher = greater relative exposure. GS (Ground Shaking / PGA) is itself 0–100 and drives the liquefaction and landslide scores. Final score weights: Proximity 0.35 · PGA 0.25 · Secondary 0.20 · Historical 0.20. Run a query to see the computation for your coordinate.

Proximity Score 0–100 · P_fault
Fault-proximity exposure. Exponential decay with distance (α = 0.15).
Ground Shaking / PGA Score 0–100 · GS
Seismicity (N₅₀) saturates via w₁; fault proximity adds via w₂.
Liquefaction Score 0–100 · Secondary
Shaking attenuated by distance to nearest epicenter (δ = 0.05).
Landslide Score 0–100 · Secondary
Shaking attenuated by fault distance via tanh (κ = 0.07).
Ground Rupture Score 0–100 · Secondary
Non-zero only within the rupture zone (R_rupture = 0.5 km).
Secondary Hazard Score 0–100 · Composite
Mean of liquefaction, landslide and ground rupture.
Historical Activity Score 0–100 · Density
Epicentral density ρ = N/(πR²) mapped through a banded table.
Final Earthquake Hazard Score 0–100 · Weighted
Weighted sum of the four components. The weights encode how much each contributes to overall earthquake risk:
Proximity 0.35Distance to the nearest active fault — the largest weight, as rupture proximity dominates damage.
PGA 0.25Ground shaking from historical seismicity and fault proximity — the main damage mechanism.
Secondary 0.20Shaking-triggered effects: liquefaction, landslide and ground rupture.
Historical 0.20Epicentral density — how seismically active the area has been (likelihood).