What Does Water in Halema‘uma‘u Mean?

The slowly deepening pond of water on the floor of Halema‘uma‘u, the first in recorded history, has captured the interest of media and the public.
August 16, 2019

Water Ponds Form in Halema‘uma‘u Crater

The recent appearance of water at the bottom of Halema‘uma‘u, a crater at the summit of Kīlauea Volcano, has attracted wide attention and generated questions.
August 08, 2019

Water or No Water: That is (or Was) the Question

Everyone agreed that the photos could well show water, but could the green patch be something else?
August 02, 2019

Mauna Loa Volcano’s 1935 Lava Flow Seen in Current Coverage of Mauna Kea

The lava flow worried residents of Hilo for a time because, after ponding and likely inflating behind Puʻuhuluhulu, it suddenly broke out toward the city at alarming rates of about 2 to 3 kilometers per day (1.5 to 2 miles per day) for nearly a week in late December.
July 25, 2019

VOLCANO WATCH: Heat & Gasses Linger

Now, for the first time in over three decades, Kīlauea is not erupting. At the summit of the volcano, earthquake activity is low, and most of the National Park is open for business. No lava is flowing anywhere on Kīlauea, and volcanic air pollution on the island is the lowest it’s been since the early 1980s.
July 18, 2019

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.
July 12, 2019

USGS Volcano Notification Service Informs Residents About Hawaiian Volcanoes

HVO notifications include Volcanic Activity Notices (VANs), Status Reports, Volcano Observatory Notices for Aviation (VONAs) and Information Statements.
July 03, 2019

Getting in The (Rift) Zone: Why & How They Erupt

Rift zones are areas of weakness in the volcano which form early in its lifetime, likely due to spreading of the volcano as it settles.
June 28, 2019

Reading the Rainbow: How to Interpret an Interferogram

Interferometric Synthetic Aperture Radar calculates the difference between two radar images acquired by an orbiting satellite taken at different times.
June 21, 2019

How to Read a Seismogram: See the Earth Shake—on Your Screen

The USGS Hawaiian Volcano Observatory and its partners operate a network of seismic monitoring stations on the Island of Hawai‘i and throughout the state.
June 13, 2019