August 24 , 2017. EN.  San Cristobal , Poas , Piton de la Fournaise , Bogoslof , Tupungatito.

Home / Alaska / August 24 , 2017. EN.  San Cristobal , Poas , Piton de la Fournaise , Bogoslof , Tupungatito.

August 24 , 2017. EN.  San Cristobal , Poas , Piton de la Fournaise , Bogoslof , Tupungatito.

August 24 , 2017.

San Cristobal , Nicaragua :

12.702 ° N, 87.004 ° W
Height 1745 m

At least 50,000 people affected by the eruption of the San Cristóbal volcano in Nicaragua.

August 22, 2017. At least 50 000 people were affected by the rain of ash and the smell of sulfur in the municipality of Chinandega, Nicaragua, following the eruption of the San Cristobal volcano, according to a local newspaper.
Nicaragua’s vice president, Rosario Murillo, assured that the eruption of the volcano generated a 400-meter ash column. On the images captured by the satellite, we see the ashes and gases coming out, with a column 500 meters above the edge of the crater that spread to the west and south-east of the volcano, He underlines.
The Chinandega authorities have recommended that people protect their nose and mouth, do not rub their eyes, use wet towels, wear long-sleeved shirts and keep water and food covered, among other things.

According to Armando Saballos, volcanologist of the Nicaraguan Institute of Territorial States (INETER), this type of event usually occurs once or twice a year on the San Cristobal volcano and did not rule out future explosions from the crater.

Over the weekend, there was a gradual decline in the activity of this volcano, reducing the emission of gas and ash, which did not cease to go out late into the night on Saturday August 19 .
Until then, no explosion is reported, a moderate emission of volcanic gases is maintained as part of the expected activity, which represents no danger to the population. No ash data have been reported.
The RSAM values ​​are within the normal ranges.

INETER continues to monitor this phenomenon closely and will inform our populations of any changes that may occur.

According to a newsletter, at 5:18 on August 18, the SINAPRED received reports of ash fall in some communities near San Cristobal, including Grecia, and the municipalities of El Viejo (18 km WSW) and El Realejo (25 km SW). Based on the analysis of satellite imagery and INETER information, Washington VAAC reported that a small puff of ash from the volcano rose 300 m above the crater edge and drifted northwest. Later that day, an emission of gas containing possibly ash rose 300 m and drifted westward. A plume of ash has been identified on satellite images up to 265 km west. Seismicity was high. Steam and gas emissions continued for the rest of the day.

Source :  EL PAIS , Ineter , GVP


Poas , Costa Rica :

10.2 ° N, 84.233 ° W
Elevation 2708 m

22-08-2017, 16:38, volcano Poás:
After 12 hours, the massif launched a new eruption which continues until this hour. The column exceeds 500 m above the active crater and is scattered to the west, based on the RMS cameras.

OVSICORI-UNA reported that an event on the Poás at 15:17 on August 22 generated a plume that rose 300 m above the edge of the crater.

Source : Dr. Maurice M. Mora , GVP

Piton de la Fournaise , La Réunion :

Activity Report for Wednesday, August 23, 2017 at 3:00 pm (local time).

The eruption that began on July 14 at 00:50 local time continues. The volcanic tremor (indicator of surface eruptive intensity) is maintained at a stable and low level.

Figure 1: Evolution of the RSAM (volcanic tremor and eruption intensity indicator) between 00:00 (20h UTC) on 14th July and 15h00 (11h00 UTC) on August 23rd on the seismic station of RVL, located on the flank South of the volcano. (OVPF / IPGP)

– Two volcano-tectonic earthquakes of low magnitude were recorded under the southeast area of the enclosure during yesterday.
– No significant deformation has been observed in the last few days.


The often unfavorable meteorological conditions, as well as the observed low fluxes, have not made it possible to make reliable estimates of the flow of lava by the use of satellites.

Source : OVPF
Photo : F Leveneur


Bogoslof , Alaska :

53 ° 55’38 « N 168 ° 2’4 » W,
Summit: 492 ft (150 m)
Current Volcano Alert Level: WATCH
Current color code of aviation: ORANGE

Troubles continue on the Bogoslof volcano. Some minor explosions were detected in the infrasound data (atmospheric pressure) this morning at 4:10 AM AKDT (12:10 UTC), but no significant activity was observed. The satellite data obtained today indicate that the lava dome in the lake in the center of the island, just west of the 1992 lava has reached about 525 feet (160 m in diameter) since August 20.

The presence of a growing mound of lava announced the end of several past eruptions of Bogoslof. However, during certain periods of eruption, the effusion of lava was followed by additional explosions and destruction of the dome. If future explosions occur, it is possible that the resulting volcanic cloud may be ash-rich than those that have occurred so far in the Bogoslof eruption in 2016-17.
The color code of  aviation stays at ORANGE and the alert level remains at WATCH.

Source : AVO
Photo : Schaefer, Janet


Tupungatito , Chile :

Special volcanic activity report (REAV) Metropolitan area August 23, 2017.

The National Service of Geology and Mining (SERNAGEOMIN) announces the following information obtained from the National Network monitoring teams volcanic monitoring, processed and analyzed volcanic Observatory of Southern Andes, interpretation center data SERNAGEOMIN:

Yesterday, Wednesday, August 23, 2017 at 7:39 local time (10:39 GMT), the monitoring stations near the volcano Tupungatito, recorded a series of earthquakes related to fracturing of rocks, called volcano-tectonic. The main event was located 6.1 km to the west (O) of the main crater.

The location obtained was as follows:

TIME OF ORIGIN: 10:39 (GMT -3)
LATITUDE: 33 ° 23’28.20 « South
LONGITUDE: 69 ° 53’30.00 « West
DEPTH: 8.2 km


At the time of this report, 18 smaller earthquakes were recorded. It should be noted that the series of events began with a smaller volcano-tectonic earthquake (ML 2.9) and a location similar to that reported. It is to be hoped that the development of this tectonic process launched with greater evidence from the beginning of August will continue, which will likely be sustained for a further period.
The volcanic technical alert is maintained at the green level.
The Sernageomin continues with on-line monitoring, and will report in a timely manner on possible changes in volcanic activity in the region.

Source : Sernageomin

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