Pahoa, Hawaii 96778
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click here for past photos of Halemaʻumaʻu overflowing
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey

Thursday, April 28, 2016 8:25 AM HST

KILAUEA VOLCANO
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: Eruptive activity continues at Kīlauea Volcano’s summit and East Rift Zone. Seismicity and deformation rates throughout the volcano remain at background levels. Scattered lava flow activity continues on the June 27th lava flow field within about 5.7 km (3.5 mi) northeast of Puʻu ʻŌʻō. These flows currently pose no threat to nearby communities.

Summit Observations: The lava lake within the Halemaʻumaʻu Overlook crater remains active and was measured at 31.5 m (103 ft) below the crater rim when it was last measured on Wednesday, April 27, 2016. Tiltmeters at Kīlauea's summit have recorded inflationary tilt. Seismicity is within normal, background rates with tremor fluctuations associated with lava lake spattering. The summit sulfur dioxide emission rate averaged 4,900 metric tons/day on April 25.

Puʻu ʻŌʻō Observations: Webcam images over the past 24 hours show persistent glow at long-term sources within the crater and from skylights in the lava tube on the northeast flank of the cone. Seismic activity remains low at Puʻu ʻŌʻō. A tiltmeter on the cone recorded inflationary tilt over the past day. The sulfur dioxide emission rate from all East Rift Zone vents was about 300 metric tons/day when last measured on April 20.

June 27th Lava Flow Observations: Webcam images show continued surface flow activity on the June 27th flow field. The active flows are comprised of small breakouts scattered northeast of Puʻu ʻŌʻō, where they have been occurring for the past several months. This pattern is consistent with field observations on April 12, when the most distant breakouts were about 5.7 km (3.5 mi) northeast of Puʻu ʻŌʻō. The flows are not currently threatening any nearby communities.
This small-scale map shows Kīlauea’s active East Rift Zone lava flow field in relation to the eastern part of the Island of Hawaiʻi. The area of the flow field on February 20 is shown in pink, while widening and advancement of the flow field as mapped on March 25 is shown in red. Puʻu ʻŌʻō lava flows erupted prior to June 27, 2014, are shown in gray. The black box shows the extent of the accompanying large scale maps.

The blue lines show steepest-descent paths calculated from a 1983 digital elevation model (DEM; for calculation details, see http://pubs.usgs.gov/of/2007/1264/). Steepest-descent path analysis is based on the assumption that the DEM perfectly represents the earth's surface. DEMs, however, are not perfect, so the blue lines on this map can be used to infer only approximate potential flow paths. The base map is a partly transparent regional land cover map from National Oceanic and Atmospheric Administration (NOAA) Office of Coastal Management draped over a 1983 10-m digital elevation model (DEM). The bathymetry is also from NOAA.
HAWAIIAN VOLCANO OBSERVATORY WEEKLY UPDATE
U.S. Geological Survey

Thursday, January 14, 2016 9:49 AM HST


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 is not erupting. No significant change in seismicity was recorded beneath the volcano in the past week, remaining elevated above long-term background levels. In the past week, earthquakes at Mauna Loa occurred mostly beneath the volcano’s upper Southwest Rift Zone at depths less than 5 km (3 mi). Global Positioning System (GPS) measurements continue to show deformation related to inflation of a magma reservoir complex beneath the summit and upper Southwest Rift Zone.
This image is from a temporary thermal camera located on the north rim of Mauna Loa's summit caldera.  The temperature scale is in degrees Celsius up to a maximum of 500 degrees (932 degrees Fahrenheit) for this camera model, and scales automatically based on the maximum and minimum temperatures on the caldera floor and not the whole frame, which sometimes results in the rim (bottom of image) looking saturated (white).
This map shows recent changes to Kīlauea’s active East Rift Zone lava flow field. The area of the flow field on February 20 is shown in pink, while widening and advancement of the flow field as mapped on March 25 is shown in red. The yellow lines show the active lava tube system. Puʻu ʻŌʻō lava flows erupted prior to June 27, 2014, are shown in gray. Puʻu ʻŌʻō is at lower left.

The blue lines show steepest-descent paths calculated from a 1983 digital elevation model (DEM; for calculation details, see http://pubs.usgs.gov/of/2007/1264/). Steepest-descent path analysis is based on the assumption that the DEM perfectly represents the earth's surface. DEMs, however, are not perfect, so the blue lines on this map can be used to infer only approximate potential flow paths. The base map is a partly transparent 1:24,000-scale USGS digital topographic map draped over a 1983 10-m digital elevation model (DEM).