Hazard Maps
Hazard Maps
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Potential Tephra Fall Hazards for Small to Moderate-Sized Eruptions in the Long Valley - Mono Lake Area, California
Downwind deposits of ash produced by an explosive eruption could reach thicknesses of at least 20 cm at a distance of 35 km (8 in. at 22 mi), 5 cm at a distance of 85 km (2 in. at 53 mi), and about 1 cm at a distance of 300 km (0.5 in. at 185 mi).
Average Annual Wind Directions Toward Las Vegas, Nevada
Since winds above the Long Valley area blow toward an easterly direction more than 80 percent of the time, air routes east of the volcano are likely to be contaminated with volcanic ash during a future eruption.
Principal Air Routes Above 18,000 ft Near Long Valley, California
Future explosive eruptions like those that occurred about 600 years ago from the Mono-Inyo Craters volcanic chain in the Long Valley area would generate eruption columns higher than 18,000 feet above sea level.