Short-lived explosion at Atka volcanic complex, Aviation Color Code raised to Yellow, Alaska
A small, short-lived explosion was detected at the Atka volcanic complex in Alaska at 03:36 UTC on March 28, 2024 (19:36 AKDT on March 27).
Small explosion at Kanaga volcano, Aviation Color Code raised to Yellow, Alaska
A small explosion was detected at Kanaga Volcano, Alaska at 07:31 UTC on December 19, 2023.
Mount St. Helens experiences largest seismic increase since last eruption ended in 2008, US
Elevated seismic activity has been observed at Mount St. Helens in the United States since 2008 when the last eruption ended. No significant changes have been observed in other monitoring parameters and there are no signs of an imminent eruption.
New research clarifies causes of uplift and seismicity in California’s Long Valley Caldera
A recent geophysical study on California’s Long Valley Caldera has unveiled the mechanisms behind its seismic activity and uplift. The research, published in Science Advances, utilized distributed acoustic sensing and machine-learning algorithms to reach its conclusions.
High-level eruption at Shishaldin volcano, Aviation Color Code raised to Red, Alaska
An ash cloud from Alaska’s Shishaldin Volcano soared above 6 km (20 000 feet) above sea level at 13:24 UTC and up to 13.7 km (45 000 feet) by 14:18 UTC on September 25, 2023. The eruption, monitored through an array of sensors and satellite data, led authorities to elevate the Aviation Color Code to Red and the Volcano Alert Level to Warning.
Strong explosive eruption at Shishaldin volcano, ash reaches 12.8 km (42 000 feet) a.s.l., Alaska
On September 15, 2023, around 01:10 UTC, an explosive eruption from Shishaldin Volcano sent an ash-rich cloud soaring to an altitude of 12.8 km (42 000 feet), accompanied by volcanic lightning. The eruption followed a several-hour increase in seismicity. The Aviation Color Code and Volcano Alert Level were raised to RED/WARNING.
Rapid uplift and strong seismicity precede new eruption at Kīlauea, Hawaii
At 01:15 UTC on September 11, 2023 (15:15 HST, September 10), the USGS Hawaiian Volcano Observatory (HVO) identified new eruptive activity at Kīlauea’s summit within Hawai‘i Volcanoes National Park, based on webcam images and field reports. The eruption was preceded by intense seismic activity and rapid uplift at the summit.
Magma intrusion at Trident volcano, site of the world’s largest eruption of 20th century, Alaska
Alaska’s Trident volcano has seen a significant increase in seismic activity and ground uplift over the past five months, leading to concerns about a potential volcanic eruption. The Alaska Volcano Observatory (AVO) has confirmed that this unrest is the result of magma intrusion beneath the volcano. The rising magma, which can trigger an eruption, has also caused increased seismic activity in the neighboring volcanoes of the Katmai volcanic cluster, including Katmai, Martin, Mageik, and the Novarupta vent.
Large ash emissions at Shishaldin volcano, Aviation Color Code raised to Red, Alaska
Volcanic activity at Shishaldin volcano in Alaska, U.S. further increased on July 18, 2023, with increased lava flow and large ash emission. As a result, the Aviation Color Code was raised to Red.
Eruption at Shishaldin intensifies, Aviation Color Code raised to Red, Alaska
The eruption of Shishaldin Volcano has intensified, the Alaska Volcano Observatory (AVO) announced at 05:52 UTC on July 16, 2023, and raised the Aviation Color Code to Orange. At 07:57 UTC, the Aviation Color Code was raised to Red and the Volcano Alert Level to WARNING.