Current Alerts for U.S. Volcanoes

  • 2014-12-20 17:45:19 Kilauea Warning Orange
  • 2014-12-20 10:35:26 Shishaldin Watch Orange
  • 2014-12-20 10:35:26 Cleveland Advisory Yellow
  • 2014-12-19 09:32:06 Pagan Advisory Yellow
  • 2014-12-20 10:35:26 Pavlof Advisory Yellow
  • 2014-12-19 13:25:52 Cascade Range Normal Green
  • 2014-12-05 10:02:53 Haleakala Normal Green
  • 2014-12-05 10:02:53 Hualalai Normal Green
  • 2014-12-05 10:02:53 Mauna Kea Normal Green
  • 2014-12-05 10:02:53 Mauna Loa Normal Green
  • 2014-12-01 14:56:51 Yellowstone Normal Green
  • 2014-12-05 10:02:53 Lo`ihi Unassigned Unassigned

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ALASKA VOLCANO OBSERVATORY DAILY UPDATE
Saturday, December 20, 2014 10:35 AM PST (Saturday, December 20, 2014 18:35 UTC)


SHISHALDIN VOLCANO (VNUM #311360)
54°45'19" N 163°58'16" W, Summit Elevation 9373 ft (2857 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Seismic activity has remained above background over the past 24 hours. Nothing significant was observed in mostly cloudy satellite images.

PAVLOF VOLCANO (VNUM #312030)
55°25'2" N 161°53'37" W, Summit Elevation 8261 ft (2518 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Seismicity at the volcano has remained at slightly above background levels over the past 24 hours. No activity was observed in partly cloudy satellite and web camera views. Pauses in vigorous eruptive activity of days to weeks are common during eruptive episodes of Pavlof Volcano, and a return to more robust eruptive activity remains possible and could occur with little or no warning.

CLEVELAND VOLCANO (VNUM #311240)
52°49'20" N 169°56'42" W, Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

No activity was observed in mostly cloudy satellite and web camera images in the past 24 hours. No significant activity was detected in seismic or infrasound data.


OTHER ALASKA VOLCANOES

Other Alaska volcanoes show no signs of significant unrest: http://www.avo.alaska.edu/activity/

AVO scientists conduct daily checks of earthquake activity at all seismically-monitored volcanoes, examine web camera and satellite images for evidence of airborne ash and elevated surface temperatures, and consult other monitoring data as needed.

For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://www.avo.alaska.edu/color_codes.php

FOR MORE INFORMATION ON ALASKA VOLCANOES: http://www.avo.alaska.edu

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

FOLLOW AVO ON FACEBOOK: https://facebook.com/alaska.avo

FOLLOW AVO ON TWITTER: https://twitter.com/alaska.avo

CONTACT INFORMATION:
John Paskievitch, Acting Scientist-in-Charge, USGS
jpaskie@usgs.gov (907) 786-7497

Pavel Izbekov, Acting Coordinating Scientist, UAFGI
pavel@gi.alaska.edu (907) 322-4085

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.



AVO Alert Archive Search
CASCADES VOLCANO OBSERVATORY WEEKLY UPDATE
Friday, December 19, 2014 1:25 PM PST (Friday, December 19, 2014 21:25 UTC)


CASCADE RANGE VOLCANOES
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal levels of background seismicity. 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: Real-time deformation and seismic monitoring remain at background levels at all Cascade Range volcanoes in Washington and Oregon.





Mount St. Helens Seismic Information
CVO Alert Archive Search
HAWAIIAN VOLCANO OBSERVATORY CURRENT STATUS REPORT
U.S. Geological Survey
Saturday, December 20, 2014 5:45 PM HST (Sunday, December 21, 2014 03:45 UTC)


KILAUEA VOLCANO (VNUM #332010)
19°25'16" N 155°17'13" W, Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WARNING
Current Aviation Color Code: ORANGE

USGS Hawaiian Volcano Observatory (HVO) scientists mapped the location of the leading edge of the June 27th lava flow. Advancement of the flow continued at a slow rate, compared to earlier in the week, and the flow was moving at a rate of about 90 m/d (100 yds/d). The southern branch of the flow remained stalled while the northern branch was an active front about 100 m (110 yds) wide located 0.8 km (0.5 miles) from the west edge of the Pahoa Marketplace and about 1 km from Highway 130, measured in a straight line. A Hawai`i County Civil Defense overflight this afternoon observed about 50 yards of advancement over the past 10 hours.

Daily updates about Kilauea's ongoing eruptions, recent images and videos of summit and East Rift Zone volcanic activity, and data about recent earthquakes are posted on the HVO Web site at http://hvo.wr.usgs.gov.

Additional Information:

Maps, photos, Webcam views, and other information about Kilauea Volcano are available at http://volcanoes.usgs.gov/hvo/activity/kilaueastatus.php. A daily update summary is available by phone at (808) 967-8862.

For a definition of volcano alert levels and aviation color codes: http://volcanoes.usgs.gov/activity/alertsystem/index.php

A map with details of earthquakes located within the past two weeks can be found at http://hvo.wr.usgs.gov/seismic/volcweb/earthquakes/

HVO Contact Information: askHVO@usgs.gov


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 Hawai`i.



HVO Alert Archive Search
CALIFORNIA VOLCANO OBSERVATORY MONTHLY UPDATE
U.S. Geological Survey
Thursday, December 18, 2014 12:13 PM PST (Thursday, December 18, 2014 20:13 UTC)


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 November 1, 2014 (0000h PDST) through November 30, 2014 (2359h PST):
Mt Shasta:: Two earthquakes of M1.0 or greater were detected. The largest registered M=1.93.
Medicine Lake: No earthquakes of M1.0 or greater were detected.
Lassen Volcanic Center: An earthquake swarm November 9-16 occurred in the Lassen area about 24 km WNW of the town of Chester and about 1 mile south of the Lassen Volcanic National Park boundary near the Twin Meadows Trail at Patricia Lake. During the swarm more than 100 earthquakes were detected at the level of M1.0 and greater. The largest event, just after midnight on November 11, registered M3.85. Preliminary analysis suggests that the earthquakes are related to regional fault motions along the northwest margin of the Walker Lane fault system. Ground deformation indicative of volcanic unrest was not detected by nearby GPS receivers. Local observers noted a disturbance in the flow of the nearby Growler Hot Spring, and USGS scientists also detected modest geochemical changes in the waters. Hot spring changes are likely due to the opening of new ground cracks during the swarm.
Clear Lake Volcanic Field: Three earthquakes of M1.0 were detected. The largest registered M=1.50. [Note: Typical high level of seismicity was observed under the Geysers steam field located at the western margin of CLVF. The largest event was M=3.21].
Long Valley Volcanic Region: A modest earthquake swarm occurred in Long Valley Caldera between November 21-25. In total, over 100 earthquakes of M1.0 and greater were detected, with the largest registering M2.70. Elsewhere in the region, one magnitude M1.22 earthquake was detected along the Mono-Inyo chain and one earthquake of M=1.80 was detected under Mammoth Mountain. [Note: The typical high level of seismicity was observed south of the caldera in the Sierra Nevada range. The largest registered M=3.18].
Ubehebe Craters: No earthquakes at or above M1.0 were detected.
Salton Buttes: The typical high level of seismicity was observed in the vicinity of the buttes, with 9 earthquakes of M1.0 or greater. The largest registered M=1.83.
Coso Volcanic Field: The typical high level of seismicity was observed, with 15 earthquakes M1.0 or greater. The largest registered M=2.38.

The U.S. Geological Survey will continue to monitor these volcanoes closely and will issue additional updates and changes in alert level as warranted. For a definition of alert levels see http://volcanoes.usgs.gov/activity/alertsystem/icons.php.

As part of the U.S. Geological Survey's Volcano Hazards Program, the California Volcano Observatory aims to advance scientific understanding of volcanic processes and lessen the harmful impacts of volcanic activity in the volcanically active areas of California and Nevada. For additional USGS CalVO volcano information, background, images, and other graphics visit http://volcanoes.usgs.gov/observatories/calvo/. For general information on the USGS Volcano Hazard Program http://volcanoes.usgs.gov. Statewide seismic information for California and Nevada can be found at http://earthquake.usgs.gov/earthquakes/recenteqscanv/.







CalVO Alert Archive Search
NORTHERN MARIANA ISLANDS WEEKLY UPDATE
Friday, December 19, 2014 9:32 AM PST (Friday, December 19, 2014 17:32 UTC)


Report prepared by the U.S. Geological Survey.

PAGAN VOLCANO (VNUM #284170)
18°7'48" N 145°48' E, Summit Elevation 1870 ft (570 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Seismic, infrasound, and web camera data from Pagan Volcano remain temporarily unavailable. Satellite images over the past week were frequently obscured by clouds however steam plumes could occasionally be seen in MODIS views.

Volcanic gas from Pagan may be noticed downwind of the volcano as a distinctive sulfurous odor. Additional information about volcanic gas and vog can be found on the web at this address: http://hvo.wr.usgs.gov/hazards/FAQ_SO2-Vog-Ash/main.html

Access to the island may be restricted by the CNMI government. Contact the EMO for the latest information.


DAIKOKU SEAMOUNT (VNUM #284137)
21°19'27.12" N 144°11'39.12"E, Summit Elevation -1059 ft (-323 m)

NOAA researchers conducting bathymetry surveys report evidence of a low level eruption at Daikoku. The evidence includes: many closely spaced high-amplitude chemical and optical anomalies, high hydrogen in the water samples, and the presence of a new crater (since the last survey in 2003). No obvious activity was noted in hydro-arrays near Wake Island, nor T-phases detected in seismic data from stations on Anatahan or Sarigan.



OTHER NORTHERN MARIANA ISLAND VOLCANOES

Other Northern Mariana Islands volcanoes show no signs of significant unrest.
USGS conducts daily checks of earthquake activity at Pagan, Sarigan, and Anatahan volcanoes.

Currently, technical data transmission problems are affecting seismic and infrasound data. These issues are expected to be resolved within the next day. During this short-term outage, USGS is relying on satellite imagery to monitor the volcanoes.

For definitions of Aviation Color Codes and Volcano Alert Levels, see: http://volcanoes.usgs.gov/activity/alertsystem/index.php

SUBSCRIBE TO VOLCANO ALERT MESSAGES by email: http://volcanoes.usgs.gov/vns/

CONTACT INFORMATION:
USGS Northern Mariana Duty Scientist (808) 967-8815
http://volcano.wr.usgs.gov/cnmistatus.php

CNMI Homeland Security and Emergency Management Office (670) 664-2216
http://www.cnmihsem.gov.mp/






NMI Alert Archive Search
YELLOWSTONE VOLCANO OBSERVATORY MONTHLY UPDATE
Monday, December 1, 2014 2:56 PM MST (Monday, December 1, 2014 21:56 UTC)


YELLOWSTONE VOLCANO (VNUM #325010)
44°25'48" N 110°40'12" W, Summit Elevation 9203 ft (2805 m)
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN

Seismicity

During November 2014, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 119 earthquakes were located in the Yellowstone National Park region. The largest event was a small earthquake of magnitude 2.3 on November 26, at 12:09 AM MST, located about 34 miles southwest of Grant Village in Yellowstone National Park, Wyoming.

November 2014 seismicity is characterized by four separate small earthquake swarms .

1) A small series of 26 earthquakes occurred in the Norris Geyser Basin area, throughout November with the majority of earthquakes occurring on November 25th. The largest earthquake (magnitude 2.0) occurred November 21, at 09:37 PM MST, located 13 miles west-northwest of Lake, WY.

2) A small series of 16 earthquakes occurred November 4th and 5th MST. The largest earthquake (magnitude 1.7) occurred November 4, 09:59 PM MST, 8 miles west of Old Faithful, WY.

3) A small series of 14 earthquakes began November 27. The largest earthquake in the series (magnitude 1.9) occurred on November 27, at 04:15 PM MST, located 5 miles south from Lake, WY.

4) A small series of 12 earthquakes occurred over November 27th and 28th. The largest earthquake (magnitude 2.0) occurred November 27, at 02:33 PM MST, nine miles north-northwest of Old Faithful, WY.

Earthquake sequences like these are common and account for roughly 50% of the total seismicity in the Yellowstone region.

Yellowstone earthquake activity in November is at background levels.

Ground deformation

Deformation in north-central Yellowstone is decreasing. Subsidence at the NRWY GPS station has slowed to a rate of < 2 cm/yr.

Caldera GPS stations continue to record the pattern of uplift that has persisted since the beginning of 2014. An example can be found at:

http://www.unavco.org/instrumentation/networks/status/pbo/data/HVWY (click on Static Plots / Time Series)

The Yellowstone Volcano Observatory (YVO) provides long-term monitoring of volcanic and earthquake activity in the Yellowstone National Park region. Yellowstone is the site of the largest and most diverse collection of natural thermal features in the world and the first National Park. YVO is one of the five USGS Volcano Observatories that monitor volcanoes within the United States for science and public safety.

YVO Member agencies: USGS, Yellowstone National Park, University of Utah, University of Wyoming, UNAVCO, Inc., Wyoming State Geological Survey, Montana Bureau of Mines and Geology, Idaho Geological Survey

CONTACT INFORMATION:
Jacob Lowenstern, Scientist-in-Charge
jlwnstrn@usgs.gov






YVO Alert Archive Search