Images

By mid-afternoon, when these photos were taken, the drop in the lava lake level was obvious. A "bathtub ring" of black lava forming a rim on the vent wall (between the lighter-colored rocks higher in the wall and the surface of the lava lake) provides a record of the lake's previous higher level.

Mount St. Helens monitoring station SEP during temporary installation of a 20 foot mast to restore data flow after heavy snow buried the site and cut off seismic data transmission.

Mount St. Helens monitoring station SEP buried in about 10-15 ft of snow. Station stands approximately 8 ft tall and is located to the right of the person in this photo. April 21, 2018

Ben Gaddis, a volunteer at the USGS Hawaiian Volcano Observatory, works on historical documentation of volcanic products from the 1924 explosive eruption of Halema‘uma‘u Crater within Kīlauea's summit caldera. Ben recently received the U.S. Department of Interior's "Citizen's Award for Exceptional Service" for his many years of volunteer service at HVO.

The ocean entry at Kamokuna remains active, with a small lava delta. Views of the lava streams entering the water were obscured by the thick plume. Very weak littoral explosions were occurring.

Lava flowing from Kīlauea again

Local volcanologist to assess Zaire eruption

A wide range of clothing and preparedness is seen amongst the estimated 1,500 people a day visiting Kīlauea's active flow field and ocean entry.

Surface flows erupting; lava bench movement measured

Kīlauea flows are large

This map shows recent changes to Kīlauea's East Rift Zone lava flow field. The area of the active flow field as of March 30 is shown in pink, while widening and advancement of the active flow as of April 10 is shown in red. Older Pu‘u ‘Ō‘ō lava flows (1983-2016) are shown in gray. The yellow line is the trace of the active lava tube (dashed where uncertain).

A field of blocks on the sea cliff above the ocean entry suggest that lava delta collapses and explosions have recently occurred. The blocks are resting on a thick layer of Pele's hair and limu o Pele, which are small glassy particles that fall from the ocean entry plume.

HVO geologists encountered only one tiny breakout on the coastal plain on Saturday. The pali can be seen in the background.

The lava entering the ocean continues to produce a robust plume, making it difficult to get a clear view of the small lava delta that is forming.

A small delta has formed at the Kamokuna ocean entry, but views of the delta have been largely obscured by the thick ocean entry plume.

A closer view of the delta. A small black sand beach is visible on its eastern side (bottom of photo).

Fragments of floating lava drift away from the ocean entry, creating small steam plumes as the hot lava boils the seawater.

A small delta at the Kamokuna ocean entry (left) continues to slowly build. Our observations this afternoon (April 10) indicate that the coastal plain breakouts that had been active since mid-February have died within the last few days. Currently, the only active surface flows are from the March 5 breakout on the upper flow field.

This video clip shows the Kamokuna ocean entry, with the laze plume blocking the view of the delta. The billowing white cloud rising from the ocean entry is a corrosive seawater plume laden with hydrochloric acid and fine volcanic particles that can irritate the skin, eyes, and lungs.

Bogoslof Island before the 2016-17 eruption (LEFT) and on March 11, 2017 (RIGHT) The island has tripled in size as ash and explosive debris have accumulated around the eruptive vent. USGS figure courtesy of the Alaska Volcano Observatory. Image data provided under Digital Globe NextView License.

Warning sign for carbon dioxide gas located on a hiking trail just below Kīlauea Crater rim. The odorless nature of CO2 and its tendency to pool in low-lying places make it an insidious hazard for people wishing to enter summit lava tubes, and the National Park Service closed them to casual entry in 2006.