which monitors worldwide volcanic activity.
Recent Volcano Observatory Activity Reports
Recent Updates from the U.S. Geological Survey Volcano Hazards Program
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AVO Cleveland YELLOW/ADVISORY - Unrest continues. Seismicity low. Satellite/webcam views obscured by clouds.
Nov 18, 2019 21:36 - No unusual activity was observed in the local seismic or infrasound data at Cleveland over the past day, and satellite and webcam views of the volcano were obscured by clouds. Episodes of lava effusion and explosions can occur without advance warning. Explosions from Cleveland are normally short duration and only present a hazard to aviation in the immediate vicinity of the volcano. Larger explosions that present a more widespread hazard to aviation are possible, but are less likely and occur less frequently. Cleveland volcano is monitored by only two seismic ...
AVO Semisopochnoi YELLOW/ADVISORY - No eruptive activity observed in seismic, infrasound or satellite data
Nov 18, 2019 21:36 - Weak seismicity continues. No eruptive activity has been detected by regional infrasound data, and no anomalous activity was observed in cloudy satellite data over the past day. Semisopochnoi is monitored with an on-island seismic network and remotely by satellite and lightning sensors. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric conditions permit.
AVO Shishaldin ORANGE/WATCH - Elevated surface temperatures. Activity likely paused. Seismicity low but climbing.
Nov 18, 2019 21:36 - Shishaldin Volcano has been in an eruptive hiatus over the past few days, with low seismic tremor and weakly to moderately elevated surface temperatures, consistent with cooling lava flows. Satellite and webcam views were obscured by clouds, and no ash plumes have been detected. Seismicity has been climbing slowly over the past day, however, suggesting that eruptive activity may soon return. Shishaldin is monitored by local seismic and infrasound sensors, satellite data, a web camera, a telemetered geodetic network, and distant infrasound and lightning networks.
CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels.
Nov 15, 2019 19:08 - Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background levels of activity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon. Recent Observations: Activity at the Cascade Range volcanoes remained at background levels throughout the week. Small earthquakes were detected at Mount St. Helens and Rainier, and field crews performed maintenance on monitoring stations at Newberry.
HVO Mauna Loa YELLOW/ADVISORY - Mauna Loa is not erupting. Seismicity above background; continued summit inflation.
Nov 14, 2019 20:06 - Activity Summary: Mauna Loa Volcano is not erupting. Rates of deformation and seismicity have not changed significantly over the past week and remain above long-term background levels. Observations: During the past week, approximately 180 small-magnitude earthquakes (nearly all smaller than M2.0) were detected beneath the upper elevations of Mauna Loa. Most of the earthquakes occurred at shallow depths of less than 5 km (~3 miles) below sea level. Global Positioning System (GPS) and Interferometric Synthetic Aperture Radar (InSAR) measurements show continued summit ...
AVO Pavlof GREEN/NORMAL - Aviation Color Code reduced to GREEN and the Volcano Alert Level to NORMAL this week.
Nov 9, 2019 00:40 - Aviation Color Code reduced to GREEN and the Volcano Alert Level to NORMAL this week and Pavlof is at background levels of activity. The level of unrest at Pavlof can change quickly and the progression to eruptive activity can occur with little or no warning. We continue to monitor Pavlof closely and will provide any new information about the status of the volcano when or if it becomes available.
HVO Kilauea GREEN/NORMAL - Low activity: no lava; slow inflation of summit + middle ERZ; water pond in summit crater
Nov 7, 2019 21:17 - Activity Summary: Kīlauea Volcano is not erupting. Monitoring data continue to show steady rates of seismicity and ground deformation, low rates of sulfur dioxide emissions, and only minor geologic changes since the end of eruptive activity in September 2018. Observations: Monitoring data have shown no significant changes in volcanic activity during September. Seismic stations detected over 1600 events, which is an increase of ~12% from last month. Episodic increases in seismicity seem to have lost their timely periodicity, as the last swarm (Oct 13) was followed by ...
HVO Loihi Seamount UNASSIGNED/UNASSIGNED - No activity of concern for Lō"ihi.
Nov 7, 2019 21:17 - Lō"ihi's seismic activity remained very low over the past month. No earthquakes were located in the vicinity of the volcano's summit.
HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai.
Nov 7, 2019 21:17 - No significant activity was recorded at Hualālai Volcano over the past month. A couple microseismic events were detected in the vicinity of the volcano, and four around the vicinity of the volcano. HVO's continuously recording Global Positioning System (GPS) receiver atop Hualālai recorded no significant deformation over the past month.
HVO Haleakala GREEN/NORMAL - No activity of concern for Haleakalā.
Nov 7, 2019 21:17 - No significant activity was recorded at Haleakalā Volcano over the past month. No earthquakes were recorded in the vicinity of the volcano. The continuously recording Global Positioning System (GPS) instrument atop Haleakalā (MAUI) is currently out..
HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea.
Nov 7, 2019 21:17 - No significant activity was detected at Mauna Kea Volcano over the past month. Fifteen earthquakes were detected in the vicinity of the volcano. A single, continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (operated by NASA's Jet Propulsion Laboratory) recorded no significant changes in deformation during this time.
CALVO GREEN/NORMAL - Activity Update: Volcanoes monitored by CalVO show normal levels of background seismicity and ...
Nov 7, 2019 17:57 - Monitored CALIFORNIA VOLCANOES Current Volcano Alert Level: all NORMAL Current Aviation Color Code: all GREEN Activity Update: All volcanoes monitored by CalVO using telemetered, real-time sensor networks exhibit normal levels of background seismicity and deformation. Volcanoes monitored include Mount Shasta, Medicine Lake Volcano, Clear Lake Volcanic Field, Lassen Volcanic Center, Long Valley Volcanic Region, Coso Volcanic Field, Ubehebe Craters, and Salton Buttes. Observations for October 1, 2019 (0000h PST) through October 31, 2019 (2359h PST): Mount ...
YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: background seismicity and deformation
Nov 1, 2019 17:10 - Recent work and news Steamboat geyser experienced 5 water eruptions during the month, on October 1, 7, 16, 22, and 30. This brings the total number of eruptions in 2019 to 42. In October, scientists recovered 15 semi-permanent GPS stations from various locations in and around Yellowstone National Park. These stations are deployed each May in areas that are not well-covered by the continuous GPS network, but they do not have radio telemetry, so the data are only logged on site and not available in real time. Recovery of the stations before the onset of winter ...