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Recent Volcano Observatory Activity Reports
- : AVO Great Sitkin YELLOW/ADVISORY - Low-level unrest continues. No activity observed in satellite data. - Recent Volcano Observatory Activity Reports
Oct 22, 2018 20:10 - Low-level unrest continues at Great Sitkin volcano. Seismicity remains above background levels. No activity was observed in regional infrasound data or in partly cloudy satellite images during the past day. Great Sitkin volcano is monitored with a local real-time seismic network, which will typically allow AVO to detect changes in unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption would be accomplished using a combination of seismic, infrasound, lightning, and satellite data.
- : AVO Cleveland YELLOW/ADVISORY - Unrest continues. No activity observed in monitoring data. - Recent Volcano Observatory Activity Reports
Oct 22, 2018 20:10 - Low-level unrest continues at Cleveland volcano. Nothing significant has been detected in seismic and regional infrasound data. No activity observed in partly cloudy satellite views of the volcano over the past day. Cleveland volcano is monitored by only two seismic stations, which restricts AVO's ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data. The web camera, one seismic station, and the local infrasound ...
- : AVO Semisopochnoi YELLOW/ADVISORY - Seismic unrest continues. No activity in satellite data. - Recent Volcano Observatory Activity Reports
Oct 22, 2018 20:10 - Unrest continues at Semisopochnoi volcano. Seismicity remains elevated and above background levels. No significant volcanic activity was observed in partly cloudy satellite data or detected by regional infrasound sensors 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 13 minute delay if atmospheric conditions permit.
- : AVO Veniaminof ORANGE/WATCH - Eruption continues. Lava fountain, lava flow and robust steam plume. - Recent Volcano Observatory Activity Reports
Oct 22, 2018 20:10 - The eruption continues at Veniaminof volcano and is characterized by continued lava fountains and lava flow from the cone in the ice-filled summit caldera. Seismicity is above background levels and is characterized by low-level continuous tremor. Satellite views of the volcano showed elevated surface temperatures from the active lava fountain and flow. Web-camera views from Perryville showed persistent steam emissions over the past 24 hours as well as incandescence at the vent in clear night-time views. Veniaminof Volcano is monitored with a local real-time seismic ...
- : CVO Cascade Range GREEN/NORMAL - All volcanoes are at normal levels. - Recent Volcano Observatory Activity Reports
Oct 19, 2018 14:50 - 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: Activity at Cascade Range volcanoes remained at background levels throughout the week. Earlier in the week, strong winds stirred up dust and ash from deposits on the north side of Mount St. Helens, prompting notices of volcanic ash ...
- : HVO Kilauea YELLOW/ADVISORY - Low activity levels across the volcano, no lava at the surface. - Recent Volcano Observatory Activity Reports
Oct 17, 2018 05:03 - Activity Summary: Kīlauea Volcano is not erupting. Rates of seismicity, deformation, and gas release have not changed significantly over the past week. Deformation signals are consistent with refilling of the middle East Rift Zone. Observations: HVO monitoring during the past week shows low rates of seismicity at the summit and East Rift Zone (ERZ). Earthquakes continue to occur primarily at Kīlauea's summit area and south flank (magnitude-2.5 was the largest) with continued small aftershocks of the magnitude-6.9 quake on May 4, 2018. Seismicity remains low in the ...
- : HVO Mauna Loa GREEN/NORMAL - Seismicity slightly elevated. No clear evidence of resumed magmatic recharge. - Recent Volcano Observatory Activity Reports
Oct 5, 2018 02:19 - Earthquake activity remained at low levels in September, with scattered shallow events located in the summit region and upper Southwest Rift Zone, and a cluster of earthquakes located on the northwest flank of the volcano. These latter earthquakes started in late September in an area that has been intermittently active during the past few years; the largest earthquake was a magnitude-3.4 (preliminary) quake on September 30. There was no significant change in deformation trends across the volcano in September. HVO continues to monitor the volcano closely.
- : HVO Lo`ihi UNASSIGNED/UNASSIGNED - No activity of concern. - Recent Volcano Observatory Activity Reports
Oct 5, 2018 02:19 - No significant activity in September. Earthquake activity remained low at the volcano, with only two earthquakes located in the vicinity of Lō‘ihi.
- : HVO Hualalai GREEN/NORMAL - No activity of concern. - Recent Volcano Observatory Activity Reports
Oct 5, 2018 02:19 - No significant activity occurred at the volcano in September. Three earthquakes were located in the vicinity of the volcano and HVO's continuously recording Global Positioning System (GPS) receiver atop Hualālai recorded no significant deformation.
- : HVO Haleakala GREEN/NORMAL - No activity of concern. - Recent Volcano Observatory Activity Reports
Oct 5, 2018 02:19 - No significant activity in September. No earthquakes were recorded in the vicinity of the volcano and the continuously recording Global Positioning System (GPS) instrument atop Haleakalā volcano recorded no significant deformation.
- : HVO Mauna Kea GREEN/NORMAL - No activity of concern. - Recent Volcano Observatory Activity Reports
Oct 5, 2018 02:19 - No significant activity in September. About a dozen earthquakes were recorded in the vicinity of the volcano, including a single felt earthquake located near Waimea. A single, continuously recording Global Positioning System (GPS) receiver atop Mauna Kea (operated by NASA’s Jet Propulsion Laboratory) recorded no significant deformation.
- : YVO Yellowstone GREEN/NORMAL - YVO Monthly Update: normal earthquake rates and deformation; new hydrothermal activity - Recent Volcano Observatory Activity Reports
Oct 1, 2018 19:54 - Recent work and news September was a month of hydrothermal activity at Yellowstone. Steamboat geyser experienced water eruptions on September 1, 7, 12, 17, 24, and 30. This brings the total number of Steamboat eruptions in 2018 to 21. In addition, a rare eruption of Ear Spring in the Upper Geyser Basin, not far from Old Faithful, occurred on September 15 and was accompanied by changes to springs and geysers in the Geyser Hill area. A new thermal feature also formed at that time nearby, spouting scalding water that necessitated the closure of the boardwalk through ...
- : CALVO GREEN/NORMAL - Activity Update: Volcanoes monitored by CalVO show normal levels of background seismicity and ... - Recent Volcano Observatory Activity Reports
Oct 1, 2018 17:10 - 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 September 1, 2018 (0000h PST) through September 30, 2018 (2359h PDT): Mt ...
- : AVO Katmai GREEN/NORMAL - Resuspended ash from 1912 Novarupta eruption seen near King Salmon. No eruption occurring. - Recent Volcano Observatory Activity Reports
Sep 30, 2018 05:04 - Strong southeast winds in the vicinity of Katmai and the Valley of Ten Thousand Smokes have picked up loose volcanic ash erupted during the 1912 Novarupta-Katmai eruption and carried it to the northwest today. No ash has been observed in cloudy satellite data, but pilot reports have confirmed a resuspended ash cloud below an altitude of 4,000 feet and extending to the east of King Salmon. This phenomenon is not the result of recent volcanic activity and occurs during times of high winds and dry snow-free conditions in the Katmai area and other young volcanic areas of ...
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