America’s Volcanoes

Current Long Valley status from LVO:

Long Valley Caldera Daily Update issued Feb 26, 2008 09:28 PST Volcano Alert Level NORMAL - Aviation Color Code GREEN
Two small earthquakes were detected in the Long Valley area since the last update on February 25, 2008. Both events were located in the Sierra Nevada south of the caldera and were below 2.0 in magnitude.

Current Soufrière Hills status from MVO:

The pause in activity continues and measurable activity at the Soufrière Hills Volcano has remained low with no significant changes over the last 24 hours.

During periods of heavy rainfall it must be remembered that the hazard of lahar (mudflow) in the drainage channels around the volcano remains.

Current Colima status from UCOL, translated via Google:

Colima, Col.., 26 de febrero de 2008.
Informe de la actividad volcánica reciente
(Reporte: 12:00 hours)

El monitoreo of Volcán de Fuego de Colima registró dos últimas exhalaciones en las 24 horas, lo cual no ha propiciado reporte alguno sobre or afectación daños en las poblaciones colindantes, inform según el Gobierno del Estado, a través de la Unidad Estatal de Protección Civil Colima .

Últimamente, la zona donde se encuentra el se encuentra despejada volcán, pero es común que en esta época del año en su top if asienten nubes, or whether observe la presencia de lluvias ligeras eléctricas tormentas y debido a frentes fríos; de la necesidad de ahí recordar que a la población evite the permanencia en las barrancas aledañas, ante la posibilidad de lahares (flujos de award).

Por otra parte, la restricción continues sobrevuelos para los que no tengan fines científicos de protección or civil, y está prohibida la permanencia de ajenas a estas personas en las actividades barrancas of volcán.

De acuerdo al monitoreo, a las 17:02 horas de ayer el lunes volcán emitió a exhalación de color gris, que se elevó a 200 meter sobre el nivel cone with vertical direction; siguió el mismo rumbo the exhalación de hoy martes, ocurrida a las 06:48 horas, la cual fue de color blanco y sólo alcanzó a altura de 50 metros.

La información proporcionada por Unidad fue Estatal de Protección Civil Jalisco, quien el Gobierno del Estado de Colima maintains constant comunicación con respecto a la actividad, volcán en tiempo real; de esta manera, if cuenta con información responders oportuna para poder y ante cualquier contingencia garantizar la seguridad de la población, como es el interés del gobernador Jesús Silverio Cavazos Ceballos.

Furthermore, if trabaja en los programas preventivos para mantener informados a los ciudadanos sobre la evolución de la actividad volcánica, y evitar que se por rumores kind alarma.

También existe constant communication with the community brigada que se ha formado with habitantes del poblado de La Becerrera, quienes se ha capacitado en la autoprotección respecto a los desastres naturales. Así mismo, if maintained contacto permanente con el personal de la partida militar de la Yerbabuena, Becerrera, El rancho Jabalí, así como con elementos pública de seguridad del Estado, y de Comala de Protección Civil de Cuauhtémoc.

Continúan las mismas recomendaciones establecidas desde hare meses, en las que se señala que quienes if encuentren or vivan en zona de riesgo, que sigan las indicaciones este body transmite a través de los medios de comunicación, hay que destacar que la zona de exclusión de actividades para los estados de Jalisco y es de Colima 7.5 kilometres a partir de la top of volcán sobre los cauces de las barrancas. El de alerta radio prior permanece en 11.5 kilometres from the summit of volcán, el cual incluye las poblaciones de La Yerbabuena, the Becerrera y en el estado de Colima, y Causentla, Cofradía de Tonila, Atenguillo, El Saucillo, El Fresnal, El Embudo , Juan Barragan, Los Machos, El Agostadero y El Borbollón en Jalisco.

Debe evitarse la permanencia en las barrancas The Lumbre, El Cordobán, San Antonio y Monte Grande, en Colima, and El Muerto, La Tuna, Santa Ana, El Cafecito, La Arena-Durazno Beltrán y en Jalisco.

* Note: You can consult diariamente la información de la actividad en la siguiente volcánica dirección electrónica http://www.colima-estado.gob.mx/2006/seguridad/indvolcan.php

Colima, Col. 26 2008

Current Stromboli status form INGV, translated via Google:

NOTIFIED OF 26/2/2008
(Update at 9:30 local time)
This information has analysis of seismic signals, carried out at the hall monitoring INGV section of Naples (Vesuvius Observatory), where the signals are centralized network a large seismic Banda who works on Stromboli.

I acquired data from 12 of the 13 stations that make up the network. The seismic activity recorded in last 24h submitted the following characteristics (GMT time):
• The analysis did not reveal sismogrammi seismic signals associated events landslides.
• The extent of the tremor is on an average level, with a rising trend.
• The counting of events Very Long Period (VLPs) gave a value of about 11 events per hour.
• The VLPs signal amplitude is low on values.
• The location of source signals VLPs through analysis indicates a semblance of Ipocentrale deep within the 400 m - 500 m asl
• The polarization parameters of seismic signal frequency in Banda VLPs not show substantial changes.
• The extent of the explosion-quakes is generally on medium-low values.

Current Tungurahua status from IG, translated via Google:

REPORT BY THE STATE OF VOLCANO TUNGURAHUA No. 057
Tuesday, 26 2008
SUMMARY OF THE ACTIVITY OF THE VOLCANO
The Tungurahua volcano continues with a level of activity seen as a moderate with trend downward. The seismic activity is characterized by the generation of few events related to the mobilization of fluid inside the volcanic edifice. It has been reported slight ash fall in the sector Choglontus. No reports of noise.
ANNEX TECHNICAL AND COMMENTARY
Seismicity: There were accounted for a total of 8 events long period (LP) and 1 episode of tremor issuing short-term
Ash, wind, emissions: For most of the time the volcano has remained cloudy, however at times has been the presence of a column of steam emission with a low ash content. It also reported a slight fall of ash in the afternoon yesterday choglontus in the sector.
Rain and lahars: In the morning light rain occurred in the vicinity of volcano, but these did not generate lahars.
Sounds and observations: There has been no reported the generation of noise.

Current Popocatepetl status from CENAPRED:

February 26 11:00 h. (17:00 GMT)

In the last 24 hours the monitoring system detected 13 low exhalations acompanied by steam and gas and sometimes small ammounts of ash. Also some episodes of harmonic tremor of low amplitude were detected.

At the moment of this report we can see the volcano with a steam and gas emission (see image).

From high to low probability the expected activity scenarios in the next hours, days or weeks are: moderate exhalations, some with ash emissions; occasionally mild incandescence during nights and sporadic low level explosions with low probabilities of incandescent fragment at short distance to the crater.

There is a permanent monitoring of the volcano to detect any change. The traffic light of volcanic alert remains in YELLOW Phase 2.

The AVO Volcanic Activity Notice

AVO/USGS Volcanic Activity Notice

Volcano: Veniaminof (CAVW #1102-07-)

Current Volcano Alert Level: ADVISORY

Current Aviation Color Code: YELLOW

Issued: Friday, February 22, 2008, 12:27 PM AKST (20080222/2127Z)
Source: Alaska Volcano Observatory
Notice Number: 2008/A4
Location: N 56 deg 11 min W 159 deg 23 min
Elevation: 8225 ft (2507 m)
Area: Alaska Peninsula Alaska

Volcanic Activity Summary: Several minor bursts of ash from Veniaminof were observed on AVO Webcam images and recorded in seismic data this morning. The bursts rose less than 9,000 ft ASL (only a few hundred feet above the active intracaldera cinder cone), and were confined to the caldera.

AVO is raising the Aviation color code to Yellow and the Alert Level to Advisory.

AVO will continue to monitor activity at Mount Veniaminof using seismic data, satellite images, internet camera data and observer reports.

Recent Observations:
[Monitoring report] Sporadic increases in seismic activity have been noted since February 11, including bursts of tremor lasting 1-2 minutes occurring several times per hour. Seismic activity today includes events at the same times as the observed ash bursts. Several of the seismic events are stronger than those observed over the previous ten days, and are similar to signals observed during eruptions in 2005.

Hazard Analysis:
[General hazards] There are no indications that more vigorous activity is imminent or even likely. These small ash bursts are typical of activity at Veniaminof over the past several years. We expect that steam and ash emissions similar to those observed today may continue intermittently and could pose a hazard to people and low-flying aircraft in the vicinity of the active cone.

Venaminof daily update:

VENIAMINOF VOLCANO (CAVW #1102-07-)
56°11′52″ N 159°23′35″ W, Summit Elevation 8225 ft (2507 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY

AVO webcam images show that the active intracaldera cinder cone is emitting a constant steam plume with no ash bursts observed this morning. Intermittent low level seismic tremor continues.

There are no indications that more vigorous activity is imminent or even likely. Small ash bursts are typical of activity at Veniaminof over the past several years. We expect that steam and ash emissions to continue intermittently posing a hazard to people and low-flying aircraft in the vicinity of the active cone.

AVO will continue to monitor activity at Mount Veniaminof using seismic data, satellite images, internet camera data and observer reports.

Current Cleveland status form AVO:

CLEVELAND VOLCANO (CAVW #1101-24-)
52°49′20″ N 169°56′42″ W, Summit Elevation 5676 ft (1730 m)
Current Aviation Color Code: YELLOW
Current Volcano Alert Level: ADVISORY

Satellite images show that Cleveland volcano emitted a small, low level ash cloud on Friday, February 22 at approximately 1900 UTC (10:00 AKST). The cloud was last observed at 2338 UTC located about 300 km southeast of the volcano. Satellite images show a thermal anomaly early this morning. These small ash bursts are typical of activity at Cleveland over the past several years. No other activity has been observed or reported since the Saturday event.

AVO monitors Cleveland Volcano with satellite imagery as weather allows. The lack of a real-time seismic network at Cleveland means that AVO is unable to track local earthquake activity related to volcanic unrest. Short-lived explosions of ash that could exceed 20,000 ft above sea level can occur without warning and may go undetected on satellite imagery.Please see http://www.avo.alaska.edu/activity/Cleveland.php for more information.

Current Anathan status from HVO-CNMI:

Anatahan Daily Update issued Feb 23, 2008 11:38 MPT Volcanic-Alert Level WATCH - Aviation Color Code ORANGE
Report prepared by the U.S. Geological Survey. Seismicity at Anatahan has varied throughout the day with a steep drop in the continuous tremor starting at 1545 UTC followed by a slow buildup over the last 9 hours nearly to yesterday’s levels. The Washington VAAC observed a large plume of unknown composition emitting from the volcano in a 2230 UTC MTSAT image. OMI satellite data shows that the volcano continues to produce sulfur dioxide. During times of northerly winds, a plume from Anatahan would extend south towards and possibly over the CNMI and Guam. The Emergency Management Office (EMO) of the CNMI government will issue appropriate advisories should ash or vog be produced by Anatahan. Access to the island may be restricted by the CNMI government. Please contact the EMO to get the latest information. USGS contact information: duty scientist (808) 967-8815 http://volcano.wr.usgs.gov/cnmistatus.php

Curent Kialuea status form HVO:

Activity Summary for last 24 hours: The lava flow that entered Royal Gardens stalled but remained active 540 m (1770 ft) north of the subdivision. A second lava flow advanced eastward from the rootless shield complex along the western and southern edges of the Kalalua Cone kipuka. Seismic tremor levels and sulfur dioxide emission rates were elevated to several times background levels at Kilauea summit.

Hazard Summary: Three hazardous conditions exist currently on Kilauea volcano - potentially harmful sulfur dioxide concentrations at the summit, dangerous conditions around the Pu`u `O`o/July 21/November 21 vent area, and lava flow threat to the Royal Gardens subdivision.

The current increase in sulfur dioxide emission rates at the summit means that SO2 concentrations are likely to be at hazardous levels for visitor areas downwind of Halema`uma`u, especially during weak wind conditions or winds from the south. Most people are sensitive to sulfur dioxide at these levels. Children and individuals with asthma, chronic obstructive pulmonary disease (COPD), or other breathing problems should avoid areas in the south caldera: southwest rift zone, south caldera pullout, and the Halema`uma`u overlook parking lot. Stay informed about SO2 concentrations in continuously monitored areas (Jaggar Museum and Kilauea Visitor\’s Center). The National Park Service has closed Crater Rim Drive through the south caldera (http://www.nps.gov/havo/closed_areas.htm).

Vent areas and lava channels are hazardous and conditions can change rapidly. Lava flows advancing through vegetation are hazardous and can produce fire and methane explosions that propel chunks of lava and rock several feet into the air. Sulfur dioxide emissions from Pu`u `O`o are very high and result in hazardous concentrations downwind. Access to the 7/21 eruption site in the Kahauale`a Natural Area Reserve is closed (see http://www.state.hi.us/dlnr/chair/pio/HtmlNR/07-N076.htm). Wao Kele o Puna is also closed.

There continues to be a threat from lava flows to residents of Royal Gardens subdivision. As long as lava flows are active south of fissure D, the subdivision is within likely downslope flow paths. The rootless shields, which are now less than two miles from the subdivision, can collapse and release lava flows that advance that distance within a few days. Hawai`i County Civil Defense has been notified and is taking appropriate measures (www.lavainfo.us).

Last 24 hours at 7/21 eruption site: Yesterday’s overflight found the flow that had entered Royal Gardens earlier in the week had stalled but was still somewhat active 540 m (1770 ft) north of the subdivision. Narrow pahoehoe fingers had expanded the boundary of this southeast TEB flow about 650 m (2130 ft) eastward.

A second TEB lava flow advanced eastward enveloping the western edge of the Kalalua Cone kipuka and continuing around its southern edge. The flow advanced mostly over older Kupaianaha lava flows and re-occupied a short section of old lava tube before coming back to the surface.

Last 24 hours at Pu`u `O`o: No incandescence was observed overnight for the first time in several days. The Pu`u `O`o tiltmeter recorded no significant changes. GPS receivers continued to record contraction across the cone.

Last 24 hours at Kilauea summit: The summit tiltmeter network recorded no significant changes. GPS receivers across the caldera have not recorded significant long-term change (no contraction or extension) since early February. Seismic tremor levels fluctuated since the abrupt drop Thursday; the levels are still elevated but at low values. One small earthquake occurred on south flank faults.

Sulfur dioxide (SO2) emission rates from the summit area have been elevated at 2-4 times background values since early January. The emission rate was about 570 tonnes/day last Thursday (the last time we had sufficiently strong trade winds to make an emission rate measurement), compared to a background rate of between 150-200 tonnes/day. SO2 concentrations exceed 1 ppm in areas downwind of Halema`uma`u crater (almost half of Crater Rim Drive between Halema`uma`u parking lot and the southwest rift zone). SO2 concentrations exceed 10 ppm for a short portion of the road between the Halema`uma`u parking lot and the south caldera pullout.