ALASKA VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Wednesday, June 3, 2026, 9:49 AM AKDT (Wednesday, June 3, 2026, 17:49 UTC)
Slow eruption of lava continues. Minor seismicity detected over the past day. Satellite and web camera observations were obscured by clouds.
The current eruption began in July 2021 and, since then, lava flows have filled most of the summit crater and advanced into valleys below. There have been no explosions at Great Sitkin Volcano since an event in May 2021. The volcano is monitored using local seismic and infrasound sensors, satellite data, webcams, and regional infrasound and lightning networks.
To view monitoring data and other information about Great Sitkin Volcano: https://avo.alaska.edu/volcano/great-sitkin
The volcano was seismically quiet over the past day. Cloud cover prevented clear satellite observations of the volcano.
There is no real-time geophysical monitoring network at Mount Kupreanof. The closest functioning seismometers are approximately 17 miles (27 km) to the east of the volcano as part of the Mount Veniaminof network. Mount Kupreanof is also monitored by satellite data, remote infrasound and lightning networks, and visual observations from pilots and mariners passing by the volcano.
To view monitoring data and other information about Mount Kupreanof: https://avo.alaska.edu/volcano/kupreanof
Unrest continues. Minor seismic activity and infrasound were detected at the volcano. SO2 emissions were observed in satellite data. Satellite observations of the volcano surface and web camera observations were obscured by clouds over the past day.
Local seismic and infrasound sensors, web cameras, and a geodetic network are used to monitor Shishaldin Volcano. In addition to the local monitoring network, AVO uses nearby geophysical networks, regional infrasound and lightning data, and satellite images to detect eruptions.
To view monitoring data and other information about Shishaldin Volcano: https://avo.alaska.edu/volcano/shishaldin
Matt Haney, Scientist-in-Charge, USGS, mhaney@usgs.gov (907) 786-7497
David Fee, Coordinating Scientist, dfee1@alaska.edu UAFGI (907) 378-5460
Contact AVO: https://avo.alaska.edu/contact
The Alaska Volcano Observatory is a cooperative program of the U.S. Geological Survey, the University of Alaska Fairbanks Geophysical Institute, and the Alaska Division of Geological and Geophysical Surveys.
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Wednesday, June 3, 2026, 10:59 AM HST (Wednesday, June 3, 2026, 20:59 UTC)
Overview:
The summit eruption of Kīlauea in Halemaʻumaʻu remains paused following 9 hours of lava fountaining during episode 48 on June 1, 2026. Inflation measured by tiltmeters around the summit of Kīlauea resumed after episode 48 ended, indicating that an episode 49 is likely; preliminary forecast models indicate that the onset of fountaining episode 49 is 10-15 days from now. Glow was visible at the vents overnight and robust degassing plumes are visibly emanating from both vents in Halemaʻumaʻu during the day.
No significant activity has been noted along Kīlauea’s East Rift Zone or Southwest Rift Zone.
NOTE: Significant changes in activity between Daily Updates are posted here: https://www.usgs.gov/observatories/hvo/observatory-messages
Summit Observations:
Bright and continuous glow was visible from the south vent in Halemaʻumaʻu overnight, with intermittent glow visible from the north vent. The crater remains very steamy due to recent heavy rain. Robust degassing plumes are visibly emanating from both vents in Halemaʻumaʻu during the day.
Earthquake activity on the south rim of Halemaʻumaʻu in the southern part of Kaluapele (Kīlauea caldera) has ceased compared to the previous 24 hours, during which approximately 50 earthquakes were recorded as episode 48 ended. Most earthquakes were at a depth of less than 0.9 miles (1.5 km) below the surface and magnitude 2 or less. Low-frequency seismic pulsing continues to be recorded in Kīlauea summit region, which is typical during the pauses between eruptive episodes.
Kīlauea summit deflation totaled 17.1 microrads during episode 48. Once the episode ended, inflation resumed and has since recovered 4.9 microrads of tilt at the summit tiltmeter at Uēkahuna (UWD).
With the eruption now paused, the sulfur dioxide (SO2) emission rate from the summit is likely now varying within a typical range of 1,000 to 5,000 tonnes per day.
Rift Zone Observations:
Rates of seismicity and ground deformation remain low in the East Rift Zone and Southwest Rift Zone. SO2 emissions from the East Rift Zone remain below the detection limit.
Analysis:
The abrupt switch from deflation to inflation continued at the end of episode 48 and indicates that an episode 49 is likely. Several more days of inflationary tilt data are needed to create a robust forecast window, but preliminary estimates suggest another fountaining episode is at least 10-15 days away.
Kīlauea has been erupting episodically since December 23, 2024, from two vents (north and south) in Halema‘uma‘u. Lava fountaining episodes, which generally last for less than 12 hours, are separated by pauses that can be longer than three weeks.
HVO continues to closely monitor Kīlauea and is in contact with Hawai‘i Volcanoes National Park and the Hawai‘i County Civil Defense Agency about eruptive hazards.
Please see the Hawaiʻi Volcanoes National Park website for visitor information: https://www.nps.gov/havo/index.htm
Summary of episode 48:
A detailed account of episode 48 is given in the HVO Status Report Issued June 1: https://volcanoes.usgs.gov/hans-public/notice/DOI-USGS-HVO-2026-06-02T00:33:02+00:00
Resources:
NOTE: HVO’s monitoring network is mostly recovered from recent power- and storm-related outages. Several summit stations, including the SDH tiltmeter, will remain offline until we are able to re-establish access across the deep tephra field southwest of the caldera.
The following links provide more information about the current eruption that began on December 23, 2024:
Hazards:
This episodic eruption is occurring within a closed area of Hawai'i Volcanoes National Park.
Other significant hazards exist around Kīlauea caldera from Halemaʻumaʻu crater wall instability, ground cracking, and rockfalls that can be enhanced by earthquakes. Close to the eruptive vents, the tephra material on the crater rim is prone to cracking, slumping, and small landslides that sometimes expose hot and molten material within. This underscores the extremely hazardous nature of Kīlauea's caldera rim surrounding Halemaʻumaʻu crater, an area that has been closed to the public since late 2007.
More Information:
The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi and American Samoa.
Subscribe to these messages: https://volcanoes.usgs.gov/vns2/
Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hvo/hazards
Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hvo
Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/programs/VHP/volcanic-alert-levels-characterize-conditions-us-volcanoes
HAWAIIAN VOLCANO OBSERVATORY INFORMATION STATEMENT
U.S. Geological Survey
Tuesday, June 2, 2026, 6:37 PM HST (Wednesday, June 3, 2026, 04:37 UTC)
On Tuesday, June 2, 2026, at 5:58 p.m. HST, a magnitude-4.6 earthquake occurred 4 miles (6 km) west-northwest of Kahaluu-Keauhou on the Island of Hawaiʻi at a depth of 21 miles (34 km) below sea level. The earthquake had no apparent impact on Hualālai, Mauna Loa, or Kīlauea volcanoes.
The depth, location, and recorded seismic waves of the earthquake suggest a source due to bending of the Pacific plate from the weight of the Hawaiian island chain, a common source for earthquakes in this area. These earthquakes are generated below the volcanoes and the ocean crust in the upper mantle beneath the Hawaiian Islands. The earthquake today is similar in origin but unrelated to the magnitude-6 that occurred on May 22. Like the magnitude-6 earthquake that occurred on May 22, this event is likely related to stress from the weight of the island on the underlying rigid mantle and was not directly related to volcanic processes or magma movement. Moderate shaking was reported during this event, which could cause light damage.
The USGS Hawaiian Volcano Observatory continues to monitor Hawaiian volcanoes for any changes.
EARTHQUAKE DESCRIPTION
EARTHQUAKE INTENSITY AND AFFECTED AREA
EARTHQUAKE MAPS AND ADDITIONAL INFORMATION
The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi and American Samoa.
Subscribe to these messages: https://volcanoes.usgs.gov/vns2/
Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hvo/hazards
Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hvo
Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/programs/VHP/volcanic-alert-levels-characterize-conditions-us-volcanoes
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Tuesday, June 2, 2026, 12:46 PM HST (Tuesday, June 2, 2026, 22:46 UTC)
Overview:
Lava fountains of episode 48 occurred for 9 hours from 4:40 a.m. to 1:37 p.m. HST on June 1 from within Halemaʻumaʻu in the summit region of Kīlauea volcano. Lava fountains reached a maximum height of almost 650 ft (200 m) and lava flows covered 40% of the crater floor. Light to moderate tephra fall was reported within Hawaiʻi Volcanoes National Park, on Highway 11 near Nāmakanipaio campground, within Volcano village, Mauna Loa Estates, and Ohia Estates. Glow was still visible at the vents and on places on the crater floor overnight as the lava flow cools.
Inflation measured by tiltmeters around the summit of Kīlauea resumed after episode 48 ended, indicating that an episode 49 is likely. Several days of inflationary tilt data are needed for a forecast window.
No significant activity has been noted along Kīlauea’s East Rift Zone or Southwest Rift Zone.
Summary of episode 48:
A detailed account of episode 48 is given in the HVO Status Report Issued June 1: https://volcanoes.usgs.gov/hans-public/notice/DOI-USGS-HVO-2026-06-02T00:33:02+00:00
Current Summit Observations:
After episode 48 ended, flames could still be seen sporadically from the vents, as well as continuous glow throughout the night. The crater remains very steamy due to heavy rain this morning. Lava flows on the floor of the crater continued to move through the night but had slowed dramatically by the early morning. Areas of glow on the crater floor lava flows typically remain for several days after the end of an episode.
Approximately 50 earthquakes were recorded along the south rim Halemaʻumaʻu in the southern part of Kaluapele (Kīlauea caldera). These started about an hour before episode 48 ended and continued until about 6 a.m. HST this morning, June 2. Most earthquakes were at a depth of less than 0.6 miles (1 km) and magnitude 2 or less.
Kīlauea summit deflation totaled 17.1 microrads during episode 48. Once the episode ended, inflation resumed and has since recovered 2.7 microrads of tilt at the summit tiltmeter at Uēkahuna (UWD).
With the eruption now paused, the sulfur dioxide (SO2) emission rate from the summit is likely now varying within a typical range of 1,000 to 5,000 tonnes per day. Measurements on Friday, May 22, indicated emission rates of about 2,000 tonnes per day. Winds are very light at the summit this morning and the plume is not well defined with all the steaming in the crater. There have been about 3.5 inches (8 cm) of rain since yesterday at the summit.
Rift Zone Observations:
Rates of seismicity and ground deformation remain low in the East Rift Zone and Southwest Rift Zone. SO2 emissions from the East Rift Zone remain below the detection limit.
Analysis:
The abrupt switch from deflation to inflation continued at the end of episode 48 and indicates that an episode 49 is likely. Several more days of inflationary tilt data are needed to create a robust forecast window, but preliminary estimates suggest another fountaining episode is at least 10-15 days away.
Kīlauea has been erupting episodically since December 23, 2024, from two vents (north and south) in Halema‘uma‘u. Lava fountaining episodes, which generally last for less than 12 hours, are separated by pauses that can be longer than three weeks.
HVO continues to closely monitor Kīlauea and is in contact with Hawai‘i Volcanoes National Park and the Hawai‘i County Civil Defense Agency about eruptive hazards.
Please see the Hawaiʻi Volcanoes National Park website for visitor information: https://www.nps.gov/havo/index.htm
Resources:
NOTE: HVO’s monitoring network is mostly recovered from recent power- and storm-related outages. Several summit stations, including the SDH tiltmeter, will remain offline until we are able to re-establish access across the deep tephra field southwest of the caldera.
The following links provide more information about the current eruption that began on December 23, 2024:
Hazards:
This episodic eruption is occurring within a closed area of Hawai'i Volcanoes National Park.
Other significant hazards exist around Kīlauea caldera from Halemaʻumaʻu crater wall instability, ground cracking, and rockfalls that can be enhanced by earthquakes. Close to the eruptive vents, the tephra material on the crater rim is prone to cracking, slumping, and small landslides that sometimes expose hot and molten material within. This underscores the extremely hazardous nature of Kīlauea's caldera rim surrounding Halemaʻumaʻu crater, an area that has been closed to the public since late 2007.
More Information:
The Hawaiian Volcano Observatory is one of five volcano observatories within the U.S. Geological Survey and is responsible for monitoring volcanoes and earthquakes in Hawaiʻi and American Samoa.
Subscribe to these messages: https://volcanoes.usgs.gov/vns2/
Summary of volcanic hazards from eruptions: https://www.usgs.gov/observatories/hvo/hazards
Recent earthquakes in Hawaiʻi (map and list): https://www.usgs.gov/observatories/hvo
Explanation of Volcano Alert Levels and Aviation Color Codes: https://www.usgs.gov/programs/VHP/volcanic-alert-levels-characterize-conditions-us-volcanoes