October 27 , 2015. EN. Tungurahua, Ubinas, Kilauea .

Home / blog georges Vitton / October 27 , 2015. EN. Tungurahua, Ubinas, Kilauea .

October 27 , 2015. EN. Tungurahua, Ubinas, Kilauea .

October 27 , 2015.



Tungurahua, Equateur :


Update of activity on October 25 , 2015.

Sunday at 4:33 am (Fig. 1), an explosion of Tungurahua volcano medium was recorded. At Juive , an observer reported hearing rolling of blocks on the side of the volcano and looking through the clouds seen incandescent material. From the OVT, it was observed some of these glowing blocks on the western flank, extending over 1000 m below the crater rim. He has been associated heard any noise. Subsequently, from 5:14, observers from Chacauco, Cotaló and Manzano began reporting falls of ash in their sectors. They said they were black and red and about the size of a sugar.



After the main explosion occurred, surveillance instruments on the volcano showed the presence of a seismic tremor that lasted shortly before another explosion took place at 7:53, which was smaller than the last. There was no noise that was associated with it.


Figure 1: At the top, seismic recording by station Bilbao. Down the acoustics recording corresponding by the Mason station, with annotations of recorded explosions.

This activity presents in the previous days showed an increase in internal activity of the volcano. During the 20 and 21 October , 140 and 167 earthquakes long period (LP, associated with the movement of internal fluids) were recorded. In the following days the number of earthquakes gradually decreased (27 events on October 24), this until today when the events listed above occur. This is an activity model whose the volcano has demonstrated for several weeks.
On the development and continuation of the activity of the volcano, the IG will continue to report into daily and extraordinary reports.


Source : IGEPN

Photo : José Luis Espinosa Naranjo . ( 2012)



 Ubinas, Peru :


On October 18, the professionals of the Observatorio Vulcanológico del Sur  (OVS) of the Geophysical Institute of Peru (IGP), are mounted at the top of volcano Ubinas to inspect the crater, to identify possible deformations and check the magmatic gases in situ.



The expedition was composed of Nino Puma and Rolando Chijcheapaza, specialists of the Observatory in this kind of work. Once at the crater rim, and after two hours of climbing, experts have corroborated the constant emission of bluish color (magmatic gases) through the crater and fissures located in the walls of this part of the volcano. Moreover, contrary to what was observed during the last inspection in December 2014, they failed to distinguish the presence of a lava body on the crater floor.

« These inspections help to identify possible deformations in the crater of Ubinas, and verify the presence of emission of lava and magma gases. For Ubinas, it was not possible to conduct regular inspections because of the intense volcanic activity that is reflected in its continuous ash emissions « , said Dr. Orlando Macedo, director of the OVS.


The Ubinas volcano began in September 2013 its current eruptive process. In recent weeks its activity was characterized mainly by the recording of pulses of emission of ash and magmatic gases. The OVS   monitors this volcano through a telemetry network consisting of four seismic stations that send real-time information about what is happening on the volcano.


Source : IGP Perou.

Photo et video : IGP



Kilauea, Hawaï:

19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE


This photo looks west towards the upper East Rift Zone of Kīlauea. The fume-filled crater at Puʻu ʻŌʻō is in the foreground, and the vent for the June 27th lava flow is just out of view of the lower right corner of the photo. Mauna Loa is visible in the upper right.

Activity Summary:

Eruptions continue at Kilauea Volcano’s summit and in its east rift zone at Pu’u ‘O’o. Inflationary tilt at the summit persisted through yesterday evening, with little change in tilt since that time. This morning, the lava lake level is roughly 55 m (180 ft) below the Overlook crater rim. A minor increase in Kilauea Southwest Rift Zone earthquake activity was observed over the last several days. Scattered breakouts remain active northeast of Pu’u ‘O’o, within about 7 km (4 miles) of the vent. There is no lava flow threat to nearby communities.

Summit Observations:
Inflationary tilt at the summit, associated with a small DI event, persisted through yesterday evening, with little change in tilt since that time. The expected rise in lava lake level accompanied the inflationary tilt. This morning, the lava lake level is roughly 55 m (180 ft) below the Overlook crater rim, with typical spattering and non-spattering activity occurring within the lava lake. The small increase in earthquake activity on the southwest rift of Kilauea continues. Summit sulfur dioxide emission rates ranged from 2,500 to 6,500 metric tons per day during the past week.

A spatter cone serves as a skylight portal into the fiery depths of Pu’u ‘O’o.

Pu’u ‘O’o  Observations:
Web cam images this morning show no significant change in eruptive activity. Tilt at Pu’u ‘O’o has mirrored the summit tilt, with minor inflationary tilt over the past day. No significant changes in seismicity have occurred. The sulfur dioxide emission rate from all East Rift Zone vents was about 150 metric tons per day when last measured on October 21, 2015.

June 27th Lava Flow Observations:
This morning, webcam images show that scattered breakouts remain active between about 2.2 and 6.4 km (1.4 and 4 mi) northeast of Pu’u ‘O’o. There is no lava flow threat to nearby communities.

Source : HVO
Photo : B Omori, HVO
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