Recent Kilauea Status Reports, Updates, and Information Releases
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
Monday, December 26, 2011 7:39 AM HST (Monday, December 26, 2011 17:39 UTC)
This report on the status of Kilauea volcanic activity, in addition to maps, photos, and Webcam images (available using the menu bar above), was prepared by the USGS Hawaiian Volcano Observatory (HVO). Hawai`i Volcanoes National Park status can be found at http://www.nps.gov/havo/ or 985-6000. All times are Hawai`i Standard Time.
KILAUEA VOLCANO (CAVW #1302-01-)
19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Activity Summary for past 24 hours: The eruptions of Kilauea Volcano were stable. The West Ka`ili`ili ocean entry continued to be active fed by flows from Pu`u `O`o through the abandoned Royal Gardens subdivision and across the coastal plain. Glow could be seen from a source within Pu`u `O`o crater. At the summit, lava lake levels were stable. Overall seismic tremor levels were low and gas emissions were elevated.
Past 24 hours at Kilauea summit: The summit tilt network recorded continued DI inflation with DI deflation starting at 6:30 am this morning. The summit GPS network recorded no significant recent changes. The lava lake level rose with inflation and will probably recede as DI deflation continues. A small amount of ash-sized tephra dominated by fresh spatter that was wafted within the gas plume from the summit vent and deposited on nearby surfaces. The most recent (preliminary) sulfur dioxide emission rate measurement was 900 tonnes/day on December 20, 2011.
Seismic tremor levels were fairly stable. Three earthquakes were strong enough to be located beneath Kilauea volcano: two deep quakes west of the southwest rift zone and one on south flank faults.Background:
The summit lava lake is deep within a ~150 m (500 ft) diameter cylindrical vent with nearly vertical sides inset within the east wall and floor of Halema`uma`u Crater. Its level fluctuates from about 70 m to more than 150 m (out of sight) below the floor of Halema`uma`u Crater. The vent has been mostly active since opening with a small explosive event on March 19, 2008. Most recently, the lava level of the lake has remained below an inner ledge (75 m or 250 ft below the floor of Halema`uma`u Crater) and responded to summit tilt changes with the lake receding during deflation and rising during inflation.Past 24 hours at the middle east rift zone vents:
The lava flow to the ocean was stable. Within Pu`u `O`o crater, frequent glow could be seen from the small spatter cones on the east and south edges of Pu`u `O`o crater floor. The tiltmeter on the north flank of Pu`u `O`o recorded inflation. Seismic tremor levels near Pu`u `O`o were low. The most recent (preliminary) sulfur dioxide emission rate measurement was 500 tonnes/day on December 21, 2011, from all east rift zone sources.Lava continued to enter the tube system on the east flank of Pu`u `O`o; the tube system turns to the southeast 0.5 km, and again at 2 km, downslope. Lava flows continued to be active through this morning down the pali, across coastal plain, and into the ocean at the West Ka`ili`ili lava delta within Hawai`i Volcanoes National Park (see map); the tube appeared to be more robust with less surface flow activity and weak-to-moderate plumes being generated at the ocean entry. The branch eastward along the base of the pali appeared rejuvenated overnight.