Images

This portable "power" platform is designed to be slung by helicopter to temporary monitoring sites on Hawaiian volcanoes. The platform is being used at Webcam sites and at Kīlauea's summit to measure activity of the lava lake in Halema‘uma‘u Crater—a continuously recording gravity meter and an experimental camera for measuring sulfur dioxide gas (shown here).

Lava flow from SP Crater viewed toward the north from the rim of SP, San Francisco Volcanic Field, Arizona.

Map showing the location of magnitudes 8.2 and greater earthquakes along Peru-Chile trench from 1900 to present.

Map showing the Kahauale‘a 2 flow in relation to the eastern part of the Island of Hawai‘i as of April 7, 2014. The active front of the Kahauale‘a 2 flow was 8.2 km (5.1 miles) northeast of Pu‘u ‘Ō‘ō and advancing very slowly through thick forest.

The Kahauale‘a 2 flow remains active, with scattered pāhoehoe breakouts driving slow advancement of the flow field through the forest. Breakouts at the flow margins trigger forest fires, and numerous plumes of smoke. Today, the flow front was 8.2 km (5.1 miles) northeast of the vent on Pu‘u ‘Ō‘ō.

A comparison of a thermal image (left) with a normal photograph (right) of the Kahauale‘a 2 flow front. Brighter colors in the thermal image depict hotter surface temperatures, with white and yellow areas showing active pāhoehoe breakouts. These breakouts are distributed in a scattered fashion across this portion of the flow field.

A view of Pu‘u ‘Ō‘ō crater from the north, looking southeast. In the foreground, the crater rim has red hues due to oxidized cinder and spatter from the early days of Pu‘u ‘Ō‘ō in the 1980s. In the center of the photograph, the black crater floor consists of lava flows erupted in the last several years, with several spatter cones built upon these flows.

A closer view of the lava pond in the northeast portion of Pu‘u ‘Ō‘ō crater. The lava pond has partially closed over the past several weeks, and today was about 5 meters (yards) in diameter - about half of the diameter from two weeks ago. The pond was spattering, with small bits of airborne spatter visible in this photograph.

Scanning Electron Microscope images, collected at UH Hilo, showing a fragment of lava collected from the Pu‘u ‘Ō‘ō lava pond in November 2013. The bar scale at the right is 300 microns (0.012 in). The mostly uniform light gray is basalt glass and darker gray crystals are olivine (left) and pyroxene (right).

The left axis shows the number of earthquakes per week. The right axis is the total cumulative number of earthquakes, which means it has to always increase. It increased a lot in the period 1996-2003 when there was a period of uplift near Norris.

Catastrophic landslide near Oso, Washington, March 22, 2014.

3-component seismograms from station YHB for the M4.8 earthquake that occurred near Norris Geyser Basin on March 30, 2014, and showing the P-wave arrival pick (red) and the S-wave arrival pick (green) as determined by UUSS analysts.  The vertical blue dashed line represents the origin time of the earthquake at 12:34:39.16 UTC.

Station map showing seismograph stations used in the location of the M4.8 earthquake that occurred near Norris Geyser Basin on March 30, 2014.  The yellow star shows the earthquake epicenter.  Red triangles represent seismograph stations with a P-wave arrival pick.  Green triangles represent seismograph stations with both a P-wave and a S-wave arrival

Record section showing horizontal component seismograms from stations in the Yellowstone region from the M4.8 earthquake that occurred near Norris Geyser Basin on March 30, 2014.  The vertical blue dashed line represents the origin time of the earthquake at 12:34:39.16 UTC.  The red line represents the P-wave arrival with a velocity of ~5.7 km/s.  The

Mar 21, 2014: The Kahauale‘a 2 flow remains active, with the active flow front slowly moving through thick forest northeast of Pu‘u ‘Ō‘ō. The flow front today was 8.2 km (5.1 miles) northeast of the vent on Pu‘u ‘Ō‘ō, which is visible in the center of the photograph, although partly obscured by fume and smoke from burning trees.

Mar 21, 2014: The small (10 meters, or 30 feet, wide) lava pond within the northeast spatter cone on Pu‘u ‘Ō‘ō experiences cyclic rises and falls of the lava surface called "gas pistoning," driven by the buildup and release of gas in the pond. At the time of this photograph, the pond surface had dropped following the release of gas.

Mar 21, 2014: (Left) The lava pond surface at its highest level observed during our field work today—just before the release of gas caused it to drop during the fall cycle of the gas pistoning.

(Right) Spattering at the edge of the pond during the fall cycle.

Mar 21, 2014: The release of gas from the lava pond at Pu‘u ‘Ō‘ō nearly obscures the spatter (fluid fragments of molten lava) being thrown about a meter (3 ft) high.

Mar 21, 2014: The lava lake at the summit of Kīlauea Volcano remains active. During our observation today, the lava lake surface was about 40 m (131 ft) below the rim of the vent (the Overlook crater) within Halema‘uma‘u Crater.

Mar 7, 2014: The Kahauale‘a 2 flow remains active, and the active flow front is moving through thick forest northeast of Pu‘u ‘Ō‘ō. The flow front today was 7.9 km (4.9 miles) northeast of the vent on Pu‘u ‘Ō‘ō. Pu‘u ‘Ō‘ō is visible in the upper left of the photograph, and is partly obscured by fume.