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HAWAIIAN VOLCANO OBSERVATORY WEEKLY UPDATE (1 Viewer)


JayF

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HAWAIIAN VOLCANO OBSERVATORY WEEKLY UPDATE
U.S. Geological Survey
Thursday, May 11, 2017, 9:53 AM HST (Thursday, May 11, 2017, 19:53 UTC)


MAUNA LOA VOLCANO (VNUM #332020)
19°28'30" N 155°36'29" W, Summit Elevation 13681 ft (4170 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity continue at elevated levels, compared to previously established baselines.

Observations: Mauna Loa is not erupting. During the past week, small-magnitude earthquakes were recorded, mostly from beneath the upper southwest rift zone of the volcano at depths up to 5 km (3 mi). Microearthquakes also occurred on the east and west flanks at depths of 5-13 km (3-8 miles). GPS measurements continue to show deformations consistent with inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone. No significant changes in volcanic gas emissions were measured.

For more information on current monitoring of Mauna Loa Volcano, see: https://volcanoes.usgs.gov/volcanoes/mauna_loa/monitoring_summary.html



Background: Mauna Loa is the largest active volcano on our planet, rising gradually to 4,170 m (13,681 ft) above sea level. Its long submarine flanks descend an additional 5 km (3 mi) below sea level to the ocean floor. The ocean floor directly beneath Mauna Loa is, in turn, depressed by the volcano's great mass another 8 km (5 mi). This places Mauna Loa's summit about 17 km (56,000 ft) above its base. The enormous volcano covers half of the Island of Hawaiʻi.

Mauna Loa has erupted 33 times since its first well-documented historical eruption in 1843. Its most recent eruption was in 1984.
 

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