Current Alerts for U.S. Volcanoes

  • 2014-09-29 17:34:20 Kilauea Warning Orange
  • 2014-09-29 12:00:47 Shishaldin Watch Orange
  • 2014-09-29 12:00:47 Cleveland Advisory Yellow
  • 2014-09-26 08:30:47 Pagan Advisory Yellow
  • 2014-09-26 15:53:47 Cascade Range Normal Green
  • 2014-09-04 12:06:15 Haleakala Normal Green
  • 2014-09-04 12:06:15 Hualalai Normal Green
  • 2014-09-04 12:06:15 Mauna Kea Normal Green
  • 2014-09-04 12:06:15 Mauna Loa Normal Green
  • 2014-09-12 15:44:56 Spurr Normal Green
  • 2014-09-02 11:04:06 Yellowstone Normal Green
  • 2014-09-04 12:06:15 Lo`ihi Unassigned Unassigned
  • 2014-09-04 10:58:02 Semisopochnoi Unassigned Unassigned

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Monday, September 29, 2014 12:00 PM PDT (Monday, September 29, 2014 19:00 UTC)

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 is likely continuing. Elevated surface temperatures were observed at the summit crater over the past day. No activity observed in partly cloudy web camera images. Nothing significant noted in seismic data.

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 observed in partly cloudy satellite or web camera images. Nothing significant noted in seismic or infrasound data.


Other Alaska volcanoes show no signs of significant unrest:

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:





John Power, Scientist-in-Charge, USGS (907) 786-7497

Jeff Freymueller, Coordinating Scientist, UAFGI (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
Friday, September 26, 2014 3:53 PM PDT (Friday, September 26, 2014 22:53 UTC)

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: No unusual activity was noted at any of the Washington and Oregon Cascade volcanoes during the week. Volcano seismicity remained at background levels.

Mount St. Helens Seismic Information
CVO Alert Archive Search
HVO/USGS Volcanic Activity Notice

Volcano: Kilauea (VNUM #332010)

Current Volcano Alert Level: WARNING

Current Aviation Color Code: ORANGE

Issued: Monday, September 29, 2014, 5:34 PM HST (20140930/0334Z)
Source: Hawaiian Volcano Observatory
Notice Number: 2014/H10
Location: N 19 deg 25 min W 155 deg 17 min
Elevation: 4091 ft (1247 m)
Area: HI Hawaii and Pacific Ocean

Volcanic Activity Summary: The June 27th flow front remains stalled 2.3 km (1.4 miles) upslope from Apa`a St. and 3.3 km (2.1 mi) from Pāhoa Village Road. Two slow-moving lobes behind the stalled front have advanced northeast 65 and 80 m (215 and 260 ft) since September 26; the nearest lobe is about 125 m (410 ft) behind the stalled front. Lava continues to break out of the tube about 8 km (5 mi) behind the flow front near where lava entered a crack system on August 18. The stalled leading edge of the flow is approximately 16.4 km (10.2 miles) straight-line distance from the vent. Because the flows near the stalled front are moving very slowly, we do not offer a projection of their future movement. Our next overflight is scheduled for Wednesday.

Pāhoa town is in the Puna District of the County of Hawai`i.

Recent Observations:
[Lava flow] Leading edge of the lava flow is stalled at the flow front, but fresh lava is being supplied through the tube to breakout points about 5.4 km (3.4 mi) and immediately behind the stalled leading edge.

Hazard Analysis:
[Lava flow] Lava flow from Puu Ōō vent stalled but remained active with fresh lava being supplied behind the front.

Remarks: The Puu Ōō vent in the East Rift Zone of Kīlauea Volcano began erupting on January 3, 1983, and has continued erupting for more than 31 years, with the majority of lava flows advancing to the south. Over the past two years, lava flows have issued from the vent toward the northeast. The June 27th flow is the most recent of these flows and the first to threaten a residential area since 2010-2011. On June 27, 2014, new vents opened on the northeast flank of the Puu Ōō cone and fed a narrow lava flow to the east-northeast. On August 18, the flow entered a ground crack, traveled underground for several days, then resurfaced to form a small lava pad. This sequence was repeated three more times over the following days with lava entering and filling other cracks before reappearing at the surface, in two of the cases farther downslope. Lava emerged from the last crack on September 6, forming a surface flow that initially moved to the north, then to the northeast, at a rate of 400 m/day (1,300 ft/day). The flow slowed thereafter and, between September 12 and 19, the rate of advancement varied, averaging 225 m/day (740 ft/day). The flow front stalled by September 22, and breakouts immediately behind the flow front advanced less than 30 m/day (100 ft/day) between September 26 and 29.

Contacts: HVO media contact

Next Notice: A new VAN will be issued if conditions change significantly or alert levels are modified. While this VAN is in effect, regularly scheduled updates are posted at

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
Wednesday, August 13, 2014 10:48 AM PDT (Wednesday, August 13, 2014 17:48 UTC)

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 July 1, 2014 (0000h PDST) through July 31, 2014 (2359h PDST):
Mt Shasta:: One M1.04 earthquake was detected.
Medicine Lake: No earthquakes of M1.0 or greater were detected.
Lassen Volcanic Center: No earthquakes of M1.0 or greater were detected.
Clear Lake Volcanic Field: Two earthquakes were detected, with the largest registering M1.91. [Note: Typical high level of seismicity was observed under the Geysers steam field located at the western margin of CLVF with a maximum of M2.42].
Long Valley Volcanic Region: A robust swarm of about 200 small earthquakes occurred in Long Valley Caldera on July 7-8. The swarm originated at depths of 5-9 km, and the largest event was a M2.79. No unusual deformation was detected over this period and it posed no immediate hazard. No earthquakes at or above M1.0 were detected along the Mono-Inyo chain or under Mammoth Mountain. [Note: The typical high level of seismicity was observed south of the caldera in the Sierra Nevada range with a maximum of M2.90].
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 11 earthquakes at or above M1.0. The maximum registered M3.20.
Coso Volcanic Field: The typical high level of seismicity was observed, with 15 earthquakes at or above M1.0. The maximum registered M2.77.

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

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 For general information on the USGS Volcano Hazard Program Statewide seismic information for California and Nevada can be found at

CalVO Alert Archive Search
Friday, September 26, 2014 8:30 AM PDT (Friday, September 26, 2014 15:30 UTC)

Report prepared by the U.S. Geological Survey.

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 are temporarily unavailable. The typical steam and gas plume was observed in satellite images during occasional periods of good weather over the past week.

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:

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


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

For definitions of Aviation Color Codes and Volcano Alert Levels, see:


USGS Northern Mariana Duty Scientist (808) 967-8815

CNMI Homeland Security and Emergency Management Office (670) 664-2216

NMI Alert Archive Search
Tuesday, September 2, 2014 11:04 AM MDT (Tuesday, September 2, 2014 17:04 UTC)

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


During August 2014, the University of Utah Seismograph Stations, responsible for the operation and analysis of the Yellowstone Seismic Network, reports 207 earthquakes were located in the Yellowstone National Park (YNP) region. The largest event was a small earthquake of magnitude 2.2 on August 6, at 5:55 AM MDT, located about 15 miles southwest of Mammoth, YNP. The August earthquake sequences are described below.

1) The largest series of earthquakes (74 ranging in magnitude from -0.9 to 2.0) occurred August 18 - 21, just outside of YNP, about 6 miles north of West Yellowstone, MT.

2) A small series of 34 earthquakes (magnitudes -0.1 - 1.5) occurred on August 15 - 22, located about 6 miles south southwest of Lake, YNP.

3) On August 16 a small series of 11 earthquakes (magnitudes 0.6 - 2.1) occurred about 1.6 miles south southwest of West Thumb, YNP.

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

Yellowstone earthquake activity in August remains at normal background levels.

Ground deformation

Deformation in north-central Yellowstone continues, although the subsidence rate at the NRWY GPS station has slowed considerably over the last month to just less than 5 cm/yr.

The eastern caldera GPS station WLWY remains offline. Other caldera GPS stations continue to record the pattern of uplift that has persisted since the beginning of 2014.

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

Jacob Lowenstern, Scientist-in-Charge

YVO Alert Archive Search