Images

_{CSAV International Program participants from 2011 came from volcano observatories in the Philippines, Democratic Republic of Congo, Costa Rica, Mexico, El Salvador, Colombia, Comoros, and Indonesia.}

The Hawaiian Volcano Observatory (HVO) and Jaggar Museum are located at the summit of Kīlauea Volcano, and are visible atop the cliff to the right, on the edge of Kīlauea Caldera. HVO is about 2 km (1.25 miles) north-northwest of the lava lake in Halema‘uma‘u, fuming (but not directly visible) at the left edge of the photo.

At 9:48 PM on Friday, August 23, 2013, a collapse of a piece of the wall above the lava lake in Halema`uma`u triggered a small explosion. The explosion bombarded the rim of Halema`uma`u around the old visitor overlook with molten gobs of spatter as big as dinner plates.

Lava enters ocean at Kupapa‘u Point, Kīlauea Volcano, Hawai‘i. Photographed with a telephoto lens, the safest way to view the interaction of lava and seawater on the edge of an active delta.

On Kīlauea's East Rift Zone, the Kahauale'a 2 flow advances slowly into the Puna Forest Reserve. The Kahauale`a 2 flow began in early May, 2013, on the north side of the rift.

The Kahauale‘a 2 flow remains active north of Pu‘u ‘Ō‘ō, and has expanded a very minor amount into the forest, burning trees. The flow, which consists of slowly moving pāhoehoe, has widened but advanced little over the past two weeks.

Camera captures SO₂ released from Kīlauea's summit vent. HVO scientist tests the network link between the instrument and the Hawaiian Volcano Observatory.

Camera captures SO2 released from Kīlauea's summit vent. HVO scientist tests the network link between the instrument and the Hawaiian Volcano Observatory.

Do not be misguided by the risky actions of this person (upper right), who is standing on an active lava delta that could collapse without warning, amidst a plume of superheated steam, hydrochloric acid, and tiny particles of volcanic glass. To avoid these ocean entry hazards, HVO advises staying at least 400 m (one-quarter mile) from where lava enters the sea.

Pele's hair covers much of the ground in the area immediately downwind of the vent at Halema‘uma‘u Crater. Accumulations about a meter (yard) wide are found on the windward sides of the curbs in the Halema‘uma‘u parking lot, which is closed to the public because of the ongoing volcanic hazard (May 3, 2012).

An active lava lake is contained within the Overlook crater, within Halema‘uma‘u Crater at the summit of Kīlauea Volcano. The summit eruption began on March 19, 2008, and is now nearly five years old. The Hawaiian Volcano Observatory and Jaggar Museum are visible as a small bump on the horizon in the upper right portion of the image.

Kīlauea Volcano's summit vent within Halema‘uma‘u Crater was more than 500 feet across in March 2013, five years after it opened.

Tephra falling from a lava fountain on September 6, 1983, helped build the Pu‘u ‘Ō‘ō cone, which eventually reached a maximum height of 255 m (835 ft) in 1986.

Island of Hawai‘i map, showing Mauna Loa and the other four volcanoes that make up the island. Mauna Loa structural features include summit caldera, rift zones, radial vents, and historical lava flows.

"Stevens and Party at Kīlauea" - U.S. Minister Stevens is second from the right. Demosthenes Lycurgus and Alex Lancaster are first and second from the left, respectively.

Thomas Jaggar and his wife, Isabel, hiking on Mauna Loa during the September 1919 Southwest Rift Zone eruption.

The summit of Mauna Loa (left) rises above the vog layer on the leeward side of the Island of Hawai‘i in November 2012. The flank of Hualālai is visible at right.

The summit of Mauna Loa (left) rises above the vog layer on the leeward side of the Island of Hawai‘i in November 2012. The flank of Hualālai is visible at right.

Tina Neal responding to Kīlauea’s Pu‘u ‘Ō‘ō eruption in November of 1983. At that time, USGS personal protective equipment standards differed.

Hawaiian Volcano Observatory's Recent Earthquakes Web page from Tuesday, July 31, with earthquake shown as colored circles, according to their times of occurrence.

Lava fountains, occasionally surging to heights of 45-55 m (150-180 ft), erupted south and north of Keanakāko‘i Crater (top and middle fissures, respectively) and on the floor of Kīlauea Caldera (foreground fissure) in a spectacular summit eruption on July 19, 1974.