Unified Interior Regions

Hawai'i 'Amakihi (Chlorodrepanis virens).

The sampling mechanism (on blue tarp) is prepared and the Unoccupied Aircraft System (UAS) is inspected just before take off to collect water from the Halema‘uma‘u crater lake. Brightly colored flagging tape tied to a cable attached to the UAS indicated depth as the sampling tool was lowered into the water. 

In 2019, the Volcano Alert Level for Mauna Loa was elevated from “NORMAL” to “ADVISORY” due to increased seismicity and deformation at the volcano. This alert level does not mean an eruption is imminent, but it is a fact that Mauna Loa, which has erupted 33 times since 1843 (most recently in 1984), will erupt again. What will you do when it does? USGS Hawaiian Volcano

The 2018 Kīlauea eruption produced unprecedented levels of seismicity in the volcano’s instrumented history. The USGS Hawaiian Volcano Observatory documented about 80,000 earthquakes during the three-month-long eruption, starting with the dramatic collapse of the Puʻu ʻŌʻō cone on April 30 and ending with the final Kīlauea summit caldera collapse event on August 5. The

In the year since Kīlauea Volcano’s notable 2018 eruption ended, the lower East Rift Zone has been relatively quiet. But USGS Hawaiian Volcano Observatory scientists continue to gain insight into the eruption through ongoing research and monitoring. Some of the many questions asked by island residents include, Why did the fissures erupt along a linear pattern? How long

After a sample was collected, HVO team members transferred water from the sampling device to plastic bottles. Team members took notes, measured water pH and evaluated water temperature data for each sample collected.   

After days of rain, a window of clear weather allowed HVO geologists to make observations and take measurements of the water pond at Kīlauea's summit on January 17, 2020. No major changes were observed, and the water level continues to slowly rise. 

A close-up view of the Kilauea pond shows the color variations across the surface, and sharp boundaries among zones of different color.

Kīlauea Volcano's summit has been in an eruptive pause since the 2018 events ended over a year ago. Nevertheless, it remains a dynamic place. Ongoing inflation and seismicity indicate that the summit magma chamber is gradually recharging. A water lake, unprecedented in the written historical record, appeared at the bottom of Halema‘uma‘u in late July 2019 and has steadily

Tens of thousands of earthquakes occur each year in Hawaii, making it one of the most seismically active places in the United States. Brian Shiro, USGS Hawaiian Volcano Observatory seismologist, talks about the different types of earthquakes in Hawaii and how they are monitored to help forecast volcanic eruptions and recounts the dramatic seismicity that happened during

2018 and 2019 were years of profound change at Kīlauea Volcano and the USGS Hawaiian Volcano Observatory. Devastation caused by the largest lower East Rift Zone eruption and summit collapse in at least 200 years resulted in many transitions for island residents, including HVO. Tina Neal, Scientist-in-Charge of the Hawaiian Volcano Observatory, describes the current status