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Date published: December 21, 2017

Volcano Watch — Evolving tube network blocked and diverted lava from the Kamokuna delta

Lava erupting from the active vent on the east flank of Pu‘u ‘Ō‘ō has not entered the ocean or reached the Kamokuna lava delta during the past month. Instead, small lava flows are scattered across the 61g flow field, breaking out from the lava-tube network between Pu‘u ‘Ō‘ō and the coastal plain.

Date published: December 14, 2017

Volcano Watch — Progress can be slow but adds up

Where do we stand today with big-picture knowledge of Kīlauea and Mauna Loa acquired in the past few decades?

Date published: December 7, 2017

Volcano Watch — January is Volcano Awareness Month on the Island of Hawai‘i

January 2018 is Hawai‘i Island's 9th annual Volcano Awareness Month. 

Date published: December 3, 2017

Photo and Video Chronology - Mauna Loa - December 3, 2017

A new HVO webcam provides improved views of Mauna Loa's summit caldera, Moku‘āweoweo, from the northwest rim. 

Date published: November 30, 2017

Volcano Watch — Did aerial bombing stop the 1935 Mauna Loa lava flow?

A widely-held belief is that Thomas Jaggar, founder of the Hawaiian Volcano Observatory, was able to stop a Mauna Loa lava flow in 1935. But is it true?

Date published: November 23, 2017

Volcano Watch — What do we call new land at Kīlauea Volcano's ocean entries?

If you follow Kīlauea Volcano's ongoing East Rift Zone eruption, you are likely aware that when lava enters the ocean, it often forms new land. But what is this new land called?

Date published: November 16, 2017

Volcano Watch — Drive along Saddle Road reveals outstanding volcanic geology

Route 200, the Daniel K. Inouye Highway, crosses Humu‘ula Saddle, which separates Mauna Kea and Mauna Loa, the two largest volcanoes on the Island of Hawai‘i. This Saddle showcases outstanding volcanic geology and is easy to reach for "roadside geologists." 

Date published: November 15, 2017

Photo and Video Chronology - Mauna Loa - November 15, 2017

Lava flows, Pu‘u Pohaku‘ohanalei cone, Moku‘āweoweo's North Pit, Sulphur Cone area, and a video of Mauna Loa's summit caldera.

Date published: November 9, 2017

Volcano Watch — Magma: What's hot and what's not

Scientists at the USGS Hawaiian Volcano Observatory routinely collect lava samples from Kīlauea and use the chemistry of these samples to infer the temperature of magma (molten rock below Earth's surface).

Date published: October 26, 2017

Volcano Watch — USGS maps identify lava inundation zones for Mauna Loa

Using detailed geologic mapping and modeling of how a fluid (in this case, lava) responds to surface topography, USGS-HVO constructed nine maps depicting 18 inundation zones on Mauna Loa. Each zone identifies a segment of the volcano that could erupt lava and send flows downslope. 

Date published: October 19, 2017

Volcano Watch — New USGS video about Kīlauea Volcano's summit eruption is now online

The U.S. Geological Survey has produced a documentary, "Kīlauea Summit Eruption–Lava Returns to Halema‘uma‘u," to tell the story of the eruption, and to share imagery of the inaccessible lava lake with the public.