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
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
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.
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