- Current Update, last updated Aug 4, 2015 14:38 :
No unusual seismicity or deformation was detected during the month of July 2015.
Three earthquakes were located in the vicinity of the summit and northwest rift zone of Hualālai Volcano - none were attributable to volcanic processes.
The single continuous GPS receiver atop Hualālai did not record any significant deformation during the past month.
- Volcanic History Overview: Hualalai volcano is a basaltic shield volcano that forms the western tip of Hawai`i Island. Its summit is festooned with cinder and spatter cones and pit craters, but no caldera. 90% of the surface area of Hualalai is of Holocene age, more than half is less than 3000 years old, and about 12% is less than 1000 years old. The most recent eruptions of Hualalai took place during the end of the 18th century and in 1801, when lava flows from vents on the NW rift zone reached the sea and buried Hawaiian villages and a large fishpond. The earlier of the two flows, the Ka`upulehu lava flow, is notable for its large quantities of lava-encrusted mafic and ultramafic nodular xenoliths. The 1801 Hu`ehu`e lava flow underlies part of the international airport at Kona.
- Location: Hawaii and Pacific Ocean, HI
Elevation: 2523 m
Recent Eruption: 1801
- Hazard Assessments: Mullineaux, Donal Ray; Peterson, Donald W., 1974, Volcanic hazards on the Island of Hawaii, Open-File Report 74-239.
- Link to monitoring data: Recent Earthquakes in Hawaii Page
Volcanic Alert Level: NORMAL Aviation Color Code: GREEN