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Date published: July 11, 2019

Volcano Watch - Mauna Loa's 1975 eruption in terms of today's Volcano Alert Level

Shortly before midnight on July 5, 1975, Mauna Loa Volcano awakened with a shudder. Quickly responding to a seismic earthquake/tremor alarm at 11:18 p.m., USGS Hawaiian Volcano Observatory (HVO) staff rushed to their offices, where, at 11:42 p.m., they noted red glow above the mountain. The 1975 eruption lasted less than a day, but it ended Mauna Loa's then longest-known repose period. 

Date published: July 3, 2019

Volcano Watch - USGS Volcano Notification Service informs island residents about Hawaiian volcanoes

Hawaii residents are likely familiar with the Volcano Activity Updates that the Hawaiian Volcano Observatory (HVO) issues for Kīlauea and other active Hawaiian volcanoes. These updates, which provide situational awareness of volcanic activity and hazards, were formally established in 2006. 

Date published: June 27, 2019

Volcano Watch - Getting in the (rift) zone: why and how they erupt

Kīlauea Volcano, on the Island of Hawai‘i, has two rift zones. The East Rift Zone is longer, with 50 km (about 31 miles) on land plus another 80 km (about 43 miles) below sea level. The Southwest Rift Zone, which is historically less active, is 40 km (about 20 miles) long with only a small portion underwater.

Date published: June 20, 2019

Volcano Watch - Reading the rainbow: How to interpret an interferogram

Since the early 1990s, scientists have used radar satellites to map movement, or deformation, of Earth’s surface. Interferometric Synthetic Aperture Radar (InSAR) calculates the difference between two radar images acquired by an orbiting satellite taken at different times but looking at the same place on Earth.

Date published: June 13, 2019

Volcano Watch - Seeing the Earth shake on your screen

The USGS Hawaiian Volcano Observatory (HVO), along with its partners at NOAA's Pacific Tsunami Warning Center (PTWC) and the National...

Date published: June 10, 2019

Updated overview of Kīlauea Volcano's 2018 lower East Rift Zone eruption and summit collapse

A summary chronology and interesting facts about Kīlauea Volcano's 2018 lower East Rift Zone eruption and summit collapse.

Date published: June 6, 2019

Volcano Watch - New eyes in the sky for monitoring Hawaiian volcanoes

The Hawaiian Volcano Observatory (HVO) is no rookie when it comes to using flight to assist with monitoring Hawaiian volcanoes. Helicopters and fixed-wing aircraft have transported HVO volcanologists for decades, giving them access for visual and thermal observations, equipment maintenance, and other geophysical and geochemical measurements.

Date published: May 30, 2019

Volcano Watch - USGS to survey Kīlauea Volcano from its summit to Kumukahi

Since the end of 2018's volcanic activity, USGS Hawaiian Volcano Observatory scientists have wanted to resurvey Kīlauea Volcano's ground surface to document changes brought about by the Puna eruption and summit collapse. Doing so would allow us to more accurately answer questions about the total volumes of erupted lava and summit subsidence that occurred last summer. 

Date published: May 23, 2019

Volcano Watch - 2019 marks the 50th anniversary of Kīlauea's Mauna Ulu eruption

May 24, 2019, is a notable date in Kīlauea Volcano's history. It is the one-year anniversary of several key events in the 2018 Kīlauea eruption, most notably, the reactivation of fissure 8 with intermittent spattering while fissures 7 and 21 were producing two ‘a‘ā flows.

Date published: May 22, 2019

New USGS data release has GIS shapefiles for the June 27th lava flow

This GIS dataset shows the evolution of the "June 27th" lava flow (episode 61e of the Pu‘u ‘Ō‘ō eruption) that was active from June 27, 2014, to June 8, 2016.

Date published: May 16, 2019

Volcano Watch - Students use science for the benefit of their communities

During the 2018 eruption of Kīlauea Volcano, when fissures erupted and lava flowed in the lower East Rift Zone (LERZ), many Puna residents were displaced from their homes. We, as a community, watched from the sidelines as the eruption went on, helpless in averting the course of nature.

Date published: May 9, 2019

Volcano Watch - New insights gained from Kīlauea Volcano's 2018 summit collapses

A year ago, USGS Hawaiian Volcano Observatory scientists and Island of Hawai‘i residents were in the throes of an historically unprecedented series of events for Kīlauea.