Hazard Zones for Lava Flows on the Island of Hawai`i
Hazard zones from lava flows on the Island of Hawai`i are based chiefly on the location and frequency of historic and prehistoric eruptions and the topography of the volcanoes. Scientists have prepared a map that divides the five volcanoes of the Island of Hawai`i into zones that are ranked from 1 through 9 based on the relative likelihood of coverage by lava flows.
|Zone||Percentage of area covered by lava since 1800||Percentage of area covered by lava in last 750 years||Explanation|
|1||greater than 25||greater than 65||Includes the summits and rift zones of Kilauea and Mauna Loa where vents have been repeatedly active in historic time.|
|2||15-25||25-75||Areas adjacent to and downslope of active rift zones.|
|3||1-5||15-75||Areas gradationally less hazardous than Zone 2 because of greater distance from recently active vents and/or because the topography makes it less likely that flows will cover these areas.|
|4||about 5||less than 15||Includes all of Hualalai, where the frequency of eruptions is lower than on Kilauea and Mauna Loa. Flows typically cover large areas.|
|5||none||about 50||Areas currently protected from lava flows by the topography of the volcano.|
|6||none||very little||Same as Zone 5.|
|7||none||none||20 percent of this area covered by lava in the last 10,000 yrs.|
|8||none||none||Only a few percent of this area covered in the past 10,000 yrs.|
|9||none||none||No eruption in this area for the past 60,000 yrs.|
Wright, T.L., Chu, J.Y., Esposo, J., Heliker, C., Hodge, J., Lockwood, J.P., and Vogt, S.M., 1992, Map showing lava-flow hazard zones, island of Hawaii: U.S. Geological Survey Miscellaneous Field Studies Map MF-2193, scale 1:250,000.