Current Alerts for U.S. Volcanoes

  • 2015-05-22 06:48:04 Kilauea Watch Orange
  • 2015-05-21 11:57:31 Shishaldin Watch Orange
  • 2015-05-21 11:57:31 Cleveland Advisory Yellow
  • 2015-05-22 09:51:09 Pagan Advisory Yellow
  • 2015-05-21 11:57:31 Semisopochnoi Advisory Yellow
  • 2015-05-15 10:28:24 Cascade Range Normal Green
  • 2015-05-11 12:15:42 Haleakala Normal Green
  • 2015-05-11 12:15:42 Hualalai Normal Green
  • 2015-05-11 12:15:42 Mauna Kea Normal Green
  • 2015-05-11 12:15:42 Mauna Loa Normal Green
  • 2015-05-01 11:34:05 Yellowstone Normal Green
  • 2015-05-11 12:15:42 Lo`ihi Unassigned Unassigned

Email IconSubscribe to the Volcano Notification Service

Feed Icon Subscribe to our feed


To view the interactive volcano activity map, please visit our home page.

ALASKA VOLCANO OBSERVATORY DAILY UPDATE
Thursday, May 21, 2015 11:57 AM PDT (Thursday, May 21, 2015 18:57 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

Low-level eruptive activity continues in the summit crater, as suggested by observation of elevated surface temperatures in satellite data over the past day. Web camera observations were obscured by clouds. Seismic activity remains above background levels.

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 detected in partly cloudy satellite and web camera images of Cleveland. No significant activity was detected in seismic or infrasound (air pressure) data.

SEMISOPOCHNOI VOLCANO (VNUM #311060)
51°55'44" N 179°35'52" E, Summit Elevation 2625 ft (800 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

No activity was detected in cloudy satellite images of Semisopochnoi. Seismic activity remained elevated above background levels.

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 Power, Scientist-in-Charge, USGS
jpower@usgs.gov (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAFGI
jeff.freymueller@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, May 15, 2015 10:28 AM PDT (Friday, May 15, 2015 17:28 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 background levels of 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. Additionally, GPS data from most of the major volcanoes, and sparse real-time hydrologic and geochemical monitoring, show no anomalous activity.

Recent Observations: Activity at Cascade volcanoes in Washington and Oregon remained at background levels during the past week. One hydrology field crew conducted field work around Mount St. Helens and reported historically low river and stream flows for this time of year. The low flows are a consequence of this year's well below-average mountain snowpack.





Mount St. Helens Seismic Information
CVO Alert Archive Search
HAWAIIAN VOLCANO OBSERVATORY DAILY UPDATE
U.S. Geological Survey
Friday, May 22, 2015 6:48 AM HST (Friday, May 22, 2015 16:48 UTC)


This report on the status of Kilauea volcanic activity was prepared by the USGS Hawaiian Volcano Observatory (HVO). All times are Hawai`i Standard Time.

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

Activity Summary: Seismicity rates are currently normal beneath Kīlauea's summit and inflationary tilt has been observed starting early on May 22. At the East Rift Zone eruption site, surface flows continue to be active within about 8 km (5 mi) of Puʻu ʻŌʻō.

Summit Observations: Seismicity rates beneath Kīlauea's summit, upper East Rift Zone and Southwest Rift Zone were at normal, background levels during the past day. The summit tiltmeter network is recording inflationary tilt from the typical Halemaʻumaʻu source beginning just after midnight. Sulfur dioxide emission rates averaged 3,400-6,900 tonnes/day for the week ending May 12.

Puʻu ʻŌʻō Observations: The tiltmeter on the north flank of Puʻu ʻŌʻō continues to show no significant tilt, and seismicity rates have been normal. The sulfur dioxide emission rate from all East Rift Zone vents was about 550 tonnes/day when last measured on May 11, 2015.

June 27th Lava Flow Observations: Webcam images and satellite imagery continue to show surface flow activity from several breakouts in an area northeast Puʻu ʻŌʻō. All surface flows are occurring within 8 km (5 mi) of Puʻu ʻŌʻō.



Daily Activity Summary also available by phone: (808) 967-8862

Webcam images: http://hvo.wr.usgs.gov/cams/

Photos/Video: http://hvo.wr.usgs.gov/multimedia

Lava Flow Maps: http://hvo.wr.usgs.gov/maps/

Definitions of terms used in update: http://hvo.wr.usgs.gov/kilauea_update/definitions.pdf

Note about sulfur dioxide emission rate: http://hvo.wr.usgs.gov/volcanowatch/view.php?id=207
(Explains how HVO's method of measuring SO2 changed in 2014 and the effects of that change on reported estimates of emission rates.)

MORE INFORMATION

Overview of Kīlauea summit (Halemaʻumaʻu) and East Rift Zone (Puʻu ʻŌʻō) eruptions:
http://hvo.wr.usgs.gov/kilauea_update/background.pdf

Summary of volcanic hazards from Kīlauea eruptions:
http://hvo.wr.usgs.gov/kilauea_update/hazards.pdf

Recent Earthquakes in Hawaii (map and list):
http://hvo.wr.usgs.gov/seismic/volcweb/earthquakes/

Explanation of Volcano Alert Levels and Aviation Color Codes:
http://volcanoes.usgs.gov/activity/alertsystem/index.php
http://pubs.usgs.gov/fs/2006/3139/

Lava viewing information:
http://hvo.wr.usgs.gov/kilauea_update/viewing.pdf

HVO Contact: 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
Friday, May 1, 2015 9:46 AM PDT (Friday, May 1, 2015 16:46 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 April 1, 2015 (0000h PST) through April 30, 2015 (2359h PDT):
Mt Shasta: One M1 or greater earthquake was detected (M2.07).
Medicine Lake: No earthquakes of M1.0 or greater were detected.
Lassen Volcanic Center: Two earthquakes of M1.0 or greater were detected. The largest registered M2.22.
Clear Lake Volcanic Field: One earthquake of M1.0 or greater was detected, of M1.42. [Note: The typical high level of seismicity was observed under the Geysers steam field located at the western margin of CLVF. The largest event was M3.28].
Long Valley Volcanic Region: In Long Valley Caldera, 7 earthquakes of M1.0 or greater were detected. The largest event registered M1.86. In the Mono Craters region, ten earthquakes of M1.0 or greater were detected (M2.48 maximum), and two earthquakes of M1.0 or greater were detected under Mammoth Mountain (M1.77 maximum). [Note: The typical high level of seismicity was observed south of the caldera in the Sierra Nevada range. The largest registered M2.91].
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 13 earthquakes of M1.0 or greater. The largest registered M2.53.
Coso Volcanic Field: The typical high level of seismicity was observed, with 29 earthquakes M1.0 or greater. The largest registered M2.34.

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, May 22, 2015 9:51 AM PDT (Friday, May 22, 2015 16:51 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 viewing conditions at Pagan were partly cloudy over the past week. Typical steam and gas emissions were observed during periods of clear weather.

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.

OTHER NORTHERN MARIANA ISLAND VOLCANOES

Other Northern Mariana Islands volcanoes show no signs of significant unrest.
Equipment failure on April 3, 2015 resulted in the loss of seismic data from all but one seismic station on Anatahan.
USGS conducts daily checks of earthquake activity at Sarigan, and Anatahan 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
Friday, May 1, 2015 11:34 AM MDT (Friday, May 1, 2015 17:34 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 April 2015, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 62 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a small earthquake of magnitude 2.2 on April 26, at 10:03 PM MDT, located about 5 miles northeast of Lake, WY.

No earthquake swarm activity was present during April.

Yellowstone earthquake activity in April remains at low background levels.

Ground deformation


GPS stations in the caldera (and north of the caldera) exhibit minimal movement either up or down at this time. 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