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Recent Volcano Observatory Activity Reports
- : AVO Great Sitkin YELLOW/ADVISORY - Small earthquakes continue; no eruptive activity detected. - Recent Volcano Observatory Activity Reports
Jul 9, 2020 21:51 - Unrest continues at Great Sitkin. A few small local earthquakes have occurred over the past day. No explosive activity was detected by regional infrasound sensors and no activity was observed in cloudy satellite and web camera views. Great Sitkin volcano is monitored by local seismic and infrasound sensors, satellite data, web cameras, and remote infrasound and lightning networks.
- : AVO Makushin YELLOW/ADVISORY - Small earthquakes continue; no eruptive activity detected. - Recent Volcano Observatory Activity Reports
Jul 9, 2020 21:51 - Small earthquakes continue at Makushin as part of an earthquake sequence that started on June 15. No eruptive activity was observed in clear satellite views or in webcam images. The earthquake sequence may be associated with volcanic unrest, but there have been no signs of deformation or surface activity noted in other monitoring data. It is likely that we would see additional signs of unrest prior to an eruption, should it occur. The volcano is monitored with a network of seismic and GPS instruments, a web camera, satellite data, and regional infrasound and lightning ...
- : AVO Cleveland YELLOW/ADVISORY - No eruptive activity detected on regional networks or in satellite data. - Recent Volcano Observatory Activity Reports
Jul 9, 2020 21:51 - No activity was seen in satellite images or detected on regional geophysical networks over the past day. The local geophysical stations and web camera at Cleveland are currently unavailable due to an ongoing network outage. 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. When the ...
- : AVO Veniaminof YELLOW/ADVISORY - Low-level seismicity; no eruptive activity detected. - Recent Volcano Observatory Activity Reports
Jul 9, 2020 21:51 - Low-level seismic unrest continues at Veniaminof with periods of weak seismic tremor. No volcanic activity was seen in satellite views over the past day. Veniaminof volcano is monitored with a local real-time seismic network, which will typically allows AVO to detect changes in unrest that may lead to a more significant explosive eruption. AVO combines seismic, infrasound, lightning, and satellite data for rapid detection of such events.
- : AVO Semisopochnoi YELLOW/ADVISORY - Weak seismicity; no eruptive activity detected - Recent Volcano Observatory Activity Reports
Jul 9, 2020 21:51 - Low-level unrest continues at Semisopochnoi. Seismicity remains above background with occasional small earthquakes occurring over the past day. SO2 gas emissions were detected in satellite imagery. No eruptive activity was observed in satellite imagery or detected by regional infrasound sensors. Semisopochnoi is monitored by local seismic sensors, satellite data, and regional infrasound and lightning detection instruments. An infrasound array on Adak Island may detect explosive emissions from Semisopochnoi with a slight delay (approximately 13 minutes) if atmospheric ...
- : HVO Mauna Loa YELLOW/ADVISORY - Mauna Loa is not erupting. Seismicity above background, summit inflation continues. - Recent Volcano Observatory Activity Reports
Jul 9, 2020 19:52 - 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, HVO seismometers recorded 56 small-magnitude (
- : CALVO GREEN/NORMAL - CA volcanoes at normal background levels of seismicity and deformation during past week. - Recent Volcano Observatory Activity Reports
Jul 7, 2020 22:31 - 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 June 29, 2020 (0000h PDT) through July 6, 2020 (2359h PDT): Clear Lake Volcanic ...
- : CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels. - Recent Volcano Observatory Activity Reports
Jul 3, 2020 20:50 - 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: Over the past week small earthquakes were located at Mount Rainier, Mount St. Helens, and Mount Hood, consistent with normal seismicity levels at each volcano. During the week, field crews worked at sites near Mount St. Helens.
- : HVO Kilauea GREEN/NORMAL - No eruptive activity. Slow inflation of summit, rift zone. Rising water in summit crater lake - Recent Volcano Observatory Activity Reports
Jul 2, 2020 22:02 - Activity Summary: Kīlauea Volcano is not erupting. Monitoring data for the month of June show variable but typical 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 in June. There were approximately 1200 earthquakes during the month of June at Kīlauea, an approximate 45 percent increase in the number of earthquakes detected in May. The majority of the increase was ...
- : HVO Loihi Seamount UNASSIGNED/UNASSIGNED - No activity of concern for Lō‘ihi. - Recent Volcano Observatory Activity Reports
Jul 2, 2020 22:02 - Following the May 11th earthquake swarm on Lō‘ihi Seamount, earthquake activity has decreased and returned to average long-term earthquake rates, with four earthquakes detected in the vicinity of the seamount.
- : HVO Hualalai GREEN/NORMAL - No activity of concern for Hualālai. - Recent Volcano Observatory Activity Reports
Jul 2, 2020 22:02 - No significant activity was recorded at Hualālai Volcano over the past month. There were no earthquakes detected in 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. - Recent Volcano Observatory Activity Reports
Jul 2, 2020 22:02 - No significant activity was recorded at Haleakalā Volcano over the past month. There were no earthquakes detected in the vicinity of the volcano. The continuously recording Global Positioning System (GPS) instrument atop Haleakalā (MAUI) recorded no significant deformation.
- : HVO Mauna Kea GREEN/NORMAL - No activity of concern for Mauna Kea. - Recent Volcano Observatory Activity Reports
Jul 2, 2020 22:02 - No significant activity was detected at Mauna Kea Volcano over the past month. There were 12 small magnitude earthquakes detected beneath the summit and flanks of the volcano, less than half of those detected in May, significantly lower than average long-term earthquake rates. The largest detected earthquake was a deep (13 miles below sea level) magnitude 2.4 (M2.4) beneath the southeast flank on June 16th. The single, continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (operated by NASA’s Jet Propulsion Laboratory) recorded no significant ...
- : YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: background seismicity and deformation - Recent Volcano Observatory Activity Reports
Jul 1, 2020 17:09 - Recent work and news YVO wishes everyone continued safety and health during these challenging times. June field work in Yellowstone National Park involved maintenance of monitoring sites, including river monitoring stations, which track water levels and even water chemistry related to thermal input from Yellowstone’s hydrothermal system. Speaking of thermal input, Steamboat Geyser continues to be active, with six water eruptions in the past month, on June 3, 8, 12, 18, 23, and 29. This brings the total number of eruptions for the year to ...
- : AVO Shishaldin GREEN/NORMAL - Seismicity at background and alert level decreased. - Recent Volcano Observatory Activity Reports
Jun 26, 2020 21:07 - Only very minor seismicity was detected early in the week at Shishaldin, and web camera images showed only light steaming from the summit. The current activity is at a typical background level of Shishaldin, and thus the Alaska Volcano Observatory decreased the Aviation Color Code for Shishaldin Volcano to GREEN and the Alert Level to NORMAL on June 24, 2020. This most recent eruptive cycle at Shishaldin began in July 2019 with pauses in activity in late September/early October 2019 and February 2020. The most recent activity in mid-March was confined to the summit ...
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