Images

Participants discuss volcano hazards during the third Volcano Observatory Best Practices Workshop, held November 15-18, 2016, in Vancouver, Washington.

Participants discuss volcano hazards during the third Volcano Observatory Best Practices Workshop, held November 15-18, 2016, in Vancouver, Washington.

Foundering of the lava lake crust is common near the lake's margins. The triangular-shaped slab of crust (left of photo's center) was sinking back into the lake as more fluid lava upwelled around it.

The level of the lava lake at the summit of Kīlauea has been high recently, providing good views of spattering from the Jaggar Museum visitor overlook in Hawai‘i Volcanoes National Park. This photo shows activity as viewed from the rim of Halema‘uma‘u Crater (closed to the public since 2008 due to volcanic hazards). Spattering is common, and on Sunday (Nov.

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A close-up of Pele's hair from Kīlauea Volcano's summit lava lake. X-ray diffraction analyses of the Pele's hair (basaltic glass) collected today will provide information on the mineralogy of Kīlauea lava, which, in turn, can shed light whether the magma supply to the volcano is constant or is changing.

A USGS-HVO scientist collects Pele's hair from the parking area south of Halema‘uma‘u Crater, which has been closed since early 2008 due to ongoing volcano hazards associated with the summit lava lake.

This video shows activity in the summit lava lake in Halema‘uma‘u Crater. Spattering like this is common in the lake, and this video shows the view from the rim of Halema‘uma‘u (closed to the public due to volcanic hazards). This spattering has recently been visible from the Jaggar Overlook inside Hawai‘i Volcanoes National Park (open to the public).

This view shows Kīlauea's summit lava from the south, with the east slope of Mauna Loa in the background and Mauna Kea in the distance. The Hawaiian Volcano Observatory and the Hawai‘i National Park Service Jaggar Museum buildings are visible on the rim of Kīlauea's summit caldera, behind Halema‘uma‘u.

This photo looks south toward the lava lake in Halema‘uma‘u. The April-May 2015 lava flow is not as obvious from this perspective, but the small overflows from October 2016 stand out a bit better. They are visible as shiny pads of lava at the upper left and lower right sides of the lake.

This map shows recent changes to Kīlauea's East Rift Zone lava flow field. The area of the active flow field as of October 19 is shown in pink, while widening and advancement of the active flow as mapped on November 3 is shown in red. There have been no new surface flows and the only change is at the Kamokuna ocean entry.

The lava lake was spattering in two places along its southeast edge at the time this photo was taken. Lava wells up into the lake nears its northern edge, which is out of sight to the left, and generally flows to the south where it sinks back down along the margin of the lake.

The Pūlama pali is one of several steep fault scarps that cut the south flank of the Island of Hawai‘i. This image shows the steepest part of the Pūlama pali as viewed from the coastal plain. The fume on the face of the pali marks the trace of the active lava tube carrying lava to the ocean, which is behind the photographer.

Lava continues to flow into the ocean near the location historically known as Kamokuna. This image, taken from near the top of the Pūlama pali, shows the white plume at the ocean entry. The white plume is formed by the interaction of lava and seawater is a corrosive mixture of super-heated steam, hydrochloric acid, and tiny particles of volcanic glass

Lava entering the ocean at Kamokuna has formed a shelf-like delta that extends seaward along the older sea cliff. The active delta is now just over 16 acres in size. The FEMA emergency access road through Hawai‘i Volcanoes National Park ends where it was cut by the episode 61g lava flow.

This photo shows the Hawaiian Volcano Observatory and the Hawai‘i Volcanoes National Park Service Jaggar Museum buildings on the summit of Kīlauea Volcano, overlooking the summit caldera. Mauna Loa volcano looms in the background.

Halema‘uma‘u Crater, shown here, is about a kilometer (0.6 miles) across and contains a lava lake in a smaller crater, informally called the Overlook crater, at its southeast edge. The lava lake is about 250 m (~820 ft) long and 180 m (~590 ft) wide and, when this photo was taken, the surface of the lake was about 15 m (~50 ft) below the Overlook crater rim.

There has been little change at Pu‘u ‘Ō‘ō over the past several months. This photo, looking northeast, shows Pu‘u ‘Ō‘ō's current crater, at the center of the image with its outgassing vents, and a smaller pit at lower left hosting a small lava pond. The high point of Pu‘u ‘Ō‘ō is atop the cliff near the left edge of the photo.

This photo looks out onto the floor of Pu‘u ‘Ō‘ō from near the high point on the northwest rim of the Pu‘u ‘Ō‘ō cone. The west edge of the main crater is to the left and the pit with the lava pond is filled with fume just right of center.

Helicopter transport is the only way HVO scientists and technicians can install and maintain many monitoring instruments on the Island of Hawai‘i, conduct field experiments or map new volcanic deposits in inaccessible areas, and make direct observations of eruptions.

At the USGS Cascades Volcano Observatory Electronics Lab, technicians build, test, and prepare scientific instruments to be deployed for monitoring volcanoes worldwide.