Hawaiian Volcano Observatory
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A new volcano update is being hosted by the Hawaiian Volcano Observatory in collaboration with the Emergency Management Office of the Commonwealth of the Northern Mariana Islands.

The age of young lava flows on Haleakala's crater floor, East Maui volcano

Aerial view of Haleakala Crater from Ko`olau Gap on north side of crater, Maui Across the Hawaiian island chain in the past 200 years, eruptions have been limited to Kilauea, Mauna Loa, and Hualalai volcanoes on the Island of Hawai`i. But those living or traveling on Maui can also see evidence of very recent volcanism. Maui hosts its own active volcano, East Maui volcano, known more widely as Haleakala. Lava flows and cinder cones as young as 200-500 years in age are found along Haleakala's southwest and east coasts.

Not much older than this are lava flows and cinder cones on the floor of Haleakala Crater that were emplaced as recently as about 800 years ago. Much of the crater has been mantled by lava flows in the past 5,000 years. All these volcanic products are stark reminders that East Maui's volcano has erupted frequently in the recent past and likely will erupt again.

A geologic mapping effort begun in 1997 has yielded the most detailed and accurate picture of Haleakala's volcanic history to date. This work will culminate in a new geologic map and revised hazard assessment of Haleakala, adding much detail to the out-of-print map covering the entire volcano and compiled in the 1940s by Harold Stearns and Gordon Macdonald.

Although 500 years or more may pass before Haleakala becomes restless, it is also possible that a new eruption will begin in our lifetimes. We can better understand the precursory phenomena if we track the pattern of the volcano in repose. For these reasons, HVO maintains a skeletal seismic network on Haleakala volcano. Also we conduct surveys periodically, using GPS receivers that gather data about the volcano's surface deformation or lack thereof. See details of new mapping results.


Cities on Volcanoes 3
Meeting in Hilo, HI; 14-18 July 2003

Copyrighted paintng of Pele, Hawaiian Volcano Goddess, by Herb Kane You can still register for the third international Cities on Volcanoes meeting in Hilo, Hawai`i. To learn about the meeting's program, plenary speakers, symposia and workshops, field trips, lodging, and registration, visit the Cities on Volcanoes Web site.
Archive of previous feature stories

  Aerial view of Pu`u `O`o crater, Kilauea Volcano, Hawai`i
Photograph by R. Hoblitt
20 September 2002
Top: Aerial view of Pu`u `O`o crater looking southwest. Fume rises from spatter cones and other vents located on crater floor and south crater wall. Pu`u `O`o emits about 1,500 tonnes of sulfur dioxide gas a day.

Bottom: Close view of skylight above lava tube for Mother's Day flow, located on southwest flank of Pu`u `O`o. HVO scientists dubbed this the "cookie monster" skylight. Edifice around skylight was built by spatter tossed from lava in tube. This tube supplies all lava downstream in Mother's Day flow.

Archive of Featured Photographs

  Skylight named "Cookie Monster" on southwest flank of Pu`u `O`o, Kilauea Volcano
Photograph by J. Kauahikaua
27 September 2002


More Volcano Information from HVO and Beyond

Earthquake seismogramReport a felt earthquake to HVO using this form.
More USGS Volcano Web sites

Volcano WatchCurrent issue of Volcano Watch essay, written weekly by USGS scientists.
National Park ServiceHawai`i Volcanoes National Park, home to HVO. Find visitor information and resources here. Graphic: Kids DoorVolcanoes for kids, from the Volcano World website.