Hazard Rating Rainier Hood Crater Lake Volcano is a stratocone/stratovolcano, lava dome, complex volcano, maar, or caldera Maximum known VEI ≥ 3 Maximum known VEI ≥ 5 Maximum known VEI ≥ 7

 

geology

Hazards

Hazard Rating Rainier Hood Crater Lake
Volcano is a stratocone/stratovolcano, lava dome, complex volcano, maar, or caldera
Maximum known VEI ≥ 3
Maximum known VEI ≥ 5
Maximum known VEI ≥ 7
VEI 3+ eruption within the past 500 years
VEI 4+ eruption within the past 5,000 years
Pyroclastic flows within last 10,000 years
Mudflows (lahars) within the last 10,000 years
Destructive tsunami within last 10,000 years
Occurrence of frequent volcano-seismic crises (volcanic earthquake swarms)
Occurrence of significant ground deformation within last 50 years

SCORE

Risk

Risk Rating Rainier Hood Crater Lake
Population at risk >100
Population at risk >1,000
Population at risk >10,000
Population at risk >100,000
Population at risk >1,000,000
Historical fatalities
Evacuation as a result of historical eruption(s)
Volcano within 300 km of a passenger airport
Volcano within 300 km of an international airport

SCORE

THREAT SCORE = HAZARD SCORE x RISK SCORE

Rainier

Hood

Crater Lake

For each of the above queries to which the answer is yes, score 1. For an answer of no, score 0. If no information is found, assume the answer is no and score 0.

Hazards

Hazard Rating St. Helens Lassen Shasta
Volcano is a stratocone/stratovolcano, lava dome, complex volcano, maar, or caldera
Maximum known VEI ≥ 3
Maximum known VEI ≥ 5
Maximum known VEI ≥ 7
VEI 3+ eruption within the past 500 years
VEI 4+ eruption within the past 5,000 years
Pyroclastic flows within last 10,000 years
Mudflows (lahars) within the last 10,000 years
Destructive tsunami within last 10,000 years
Occurrence of frequent volcano-seismic crises (volcanic earthquake swarms)
Occurrence of significant ground deformation within last 50 years

SCORE

Risk

Risk Rating St. Helens Lassen Shasta
Population at risk >100
Population at risk >1,000
Population at risk >10,000
Population at risk >100,000
Population at risk >1,000,000
Historical fatalities
Evacuation as a result of historical eruption(s)
Volcano within 300 km of a passenger airport
Volcano within 300 km of an international airport

SCORE

THREAT SCORE = HAZARD SCORE x RISK SCORE

St. Helens

Lassen

Shasta

For each of the above queries to which the answer is yes, score 1. For an answer of no, score 0. If no information is found, assume the answer is no and score 0.