November 04 , 2018.

Chile , Puyehue – Cordon Caulle : 

Special Report on Volcanic Activity (REAV), Los Rios Region, Puyehue-Cordon Caulle Volcano, 03 November 2018, 4:00 am Local Time (Mainland Chile).

The National Geological and Mining Service of Chile (Sernageomin) publishes the following PRELIMINARY information, obtained from monitoring equipment of the National Volcanic Monitoring Network (NVRN), processed and analyzed at the Volcanological Observatory of the Southern Andes (OVDAS) :

Today, Saturday, November 03, 2018, between 1:21 and 2:50 am Local time, the monitoring stations installed near the Puyehue-Cordon Caulle volcanic complex recorded a seismic swarm of 120 events associated with a fracturing process of rocks (Volcano-tectonic type) , located 1.8 km north of the emission center of the year 2011.

The characteristics of the larger magnitude event, after its analysis, are as follows:

TIME OF ORIGIN: 01h26 Local time (04h26 UTC)
LATITUDE: 4.5085 ° S
LONGITUDE: 72.1392 ° W
DEPTH: 3.8 KM
LOCAL MAGNITUDE: 2.4 (ML)

OBSERVATIONS:
At the time of this report, events of similar characteristics of lower magnitude were recorded. The event was not confirmed as felt by the population.
The level of volcanic technical alert remains at the level: Green.

Sernageomin continues online monitoring and will inform in a timely manner about any changes observed.

Source : Sernageomin.

Photo : Mono DiezdelPunta ( Wikiloc)

Russia / Kurils Islands , Ebeko :

50.69 N, 156.01 E;
Elevation 3792 ft (1156 m)
Aviation Colour Code is ORANGE

The Ebeko volcano on the Paramushir island, located in the Russain Kuril Islands archipelago, spewed out a column of ash to a height of 4.5 kilometers (2.8 miles), the press service of the Russian Emergencies Ministry’s department in the Far Eastern Sakhalin Region said in a statement on Sunday, Sputnik reported.
« On November 4, the emergencies control center of the Russian Emergencies Ministry’s department in the Sakhalin Region received information that the Ebeko volcano was seen throwing ash to a height of up to 4.5 kilometers. The plume of ash has moved to the north-east of the volcano, to a distance up to five kilometers, » the statement read.

The town of Severo-Kurilsk, located seven kilometer away from the volcano, had not experienced ash fall, the statement added.

Explosive eruption of Ebeko volcano at 01:16 UTC on 10 December, 2016.

The situation is not threatening the lives of local residents, according to the statement.
Ebeko woke up in 2016 and has repeatedly thrown ash since then.

A moderate eruptive activity of the volcano continues. Ash explosions up to 19,700 ft (6 km) a.s.l. could occur at any time. Ongoing activity could affect low-flying aircraft and airport of Severo-Kurilsk.

A moderate explosive activity of the volcano continues. According to visual data by volcanologists from Severo-Kurilsk, explosions sent ash up to 3.7 km a.s.l. all week; ash clouds drifted to the different directions from the volcano; ashfalls were noted in Severo-Kurilsk on 29-31 October. Satellite data by KVERT showed a thermal anomaly over the volcano on 27 and 29 October.

Source : en.trend.az , Kvert .

Photo : L. Kotenko, IVS FEB RAS

Mexico , Popocatepetl :

During the past 24 hours, 118 exhalations have been identified through the surveillance systems of the Popocatépetl volcano. For most of this report, the weather was overcast and visibility was not available; however, these visible exhalations were accompanied by water vapor, gas, and light amounts of ash. In addition, seven minutes of low amplitude tremor were recorded. During the night, there was partial visibility towards the volcano and no incandescence was observed. At the time of writing this report, the volcano is partially visible. Any event will be scattered in the Northeast direction.

CENAPRED insists that the volcano, and in particular the crater, should not be approached, because there is the risk of falling ballistic fragments and, in the event of heavy rains, to move away from the bottom of the ravines due to landslides. field and mudslides.

The Volcanic Alert traffic light from Popocatepetl is located at Amarillo Phase 2.

Source : Cenapred.

Photo : LBZ

United-States ,  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.

Ubehebe craters.

Observations for October 1, 2018 (0000h PST) through October 31, 2018 (2359h PDT):

Mt Shasta: One earthquake at or above M1.0 was detected, registering M1.69.
Medicine Lake: One earthquake at or above M1.0 was detected, registering M1.21.
Lassen Volcanic Center: No earthquakes at or above M1.0 were detected.
Clear Lake Volcanic Field: Two earthquakes at or above M1.0 were detected, with the largest event registering M1.44. [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 M3.35].
Long Valley Volcanic Region: In Long Valley Caldera, 14 earthquakes of M1.0 or greater were detected, with the largest event registering M1.78. One earthquake at or above M1.0 was detected in the Mono Craters region (M1.56). Three earthquakes at or above M1.0 were detected under Mammoth Mountain. The largest event registered M1.46. [Note: The typical high level of seismicity was observed south of the caldera in the Sierra Nevada range. The largest event registered M2.28].
Ubehebe Craters: No earthquakes at or above M1.0 were detected.
Salton Buttes: Twenty-seven earthquakes of M1.0 or greater were detected, with the largest registering M2.85.
Coso Volcanic Field: Ten earthquakes of M1.0 or greater were detected, with the largest registering M1.99.

The U.S. Geological Survey will continue to monitor these volcanoes closely and will issue additional updates and changes in alert level as warranted.

Source : Calvo