April 18 , 2017. EN. Poas , Mauna Loa , Ubinas, Sabancaya , Fuego .

Home / blog georges Vitton / April 18 , 2017. EN. Poas , Mauna Loa , Ubinas, Sabancaya , Fuego .

April 18 , 2017. EN. Poas , Mauna Loa , Ubinas, Sabancaya , Fuego .

April 18 , 2017.


Poas , Costa Rica :

Poas Volcano Activity Report, 17 April 2017, updated at 11:00

In the last 24 hours, Poas Volcano has exhibited a tremor of varying amplitude, which increased in amplitude after the eruption of 20:22. Frequent small short-term water eruptions have been recorded by seismographs. The biggest eruptions took place at night (20h22, 22h42, 00h25). Among them, the most important is the eruption of 22:42 which lasted about. 3 minutes, and whose height is unknown due to the abundant clouds.


At the end of the 17th of April, the tremor became medium to small amplitudes. There have been no reports of ash falls. The wind was mainly oriented to the southwest. This morning showed the crater and the almost total disappearance of the dome and the increase of the surface of the lake was observed. In the present conditions of eruption of the Poas volcano, we must expect new eruptions in the short term.

Source : Ovsicori


Mauna Loa , Hawai :

19°28’30 » N 155°36’29 » W,
Summit Elevation 13681 ft (4170 m)
Current Volcano Alert Level: ADVISORY
Current Aviation Color Code: YELLOW

Activity Summary:
Mauna Loa Volcano is not erupting. Rates of deformation and seismicity remain above long-term background levels.

During the past week, nearly 150 earthquakes (strongest was a magnitude-3.1) were recorded between the 7th and the 11th of April primarily in a cluster beneath the upper west flank of the volcano at depths ranging from 0-13 km (0-8 miles).


Global Positioning System (GPS) measurements continue to show deformation related to inflation of a magma reservoir beneath the summit and upper Southwest Rift Zone.

Measurements from a continuously-monitored fumarole site within the summit caldera showed an increase in temperature during the first half of January, however, relatively steady fumarole temperatures were measured over the past week. No significant changes in volcanic gas emissions, sulfur dioxide or carbon dioxide were measured.


Changes in distance between two GPS stations on opposite sides of Mokuʻāweoweo, Mauna Loa’s summit caldera. Extension across the caldera is often an indication of inflation of the shallow summit magma reservoir.

Source : HVO


Ubinas , Peru :

At present, the Volcano Ubinas has shown in recent weeks a decrease in its seismic and fumarollian characteristics. These are tracked and reported through the OVS-IGP network of telemetry stations that send real-time information to the Cayma headquarters.

Summary of activity between 01 and 15 April 2017.

1. Sismo-volcanic monitoring:
The seismicity recorded during this period continues to show decreasing values. These levels of volcanic activity have been observed since 28 March. For example, seismo-volcanic events have decreased by 85% compared to the previous period. It was recorded in the second half on average 3 earthquakes per day. The same decrease is observed in the seismic energy and the calculated reduced displacement.
During this period there were no explosions and / or ash emissions.


Résultat de recherche d'images pour "photo cratere volcan ubinas"

2. Satellite monitoring:
Thermal anomalies and SO2: The Mirova system www.mirovaweb.it) did not detect any thermal anomalies during this period. In addition, the « EOS Aura » GSDM NASA satellite system (http://so2.gsfc.nasa.gov/) consecutively recorded moderate levels of SO2 eventually produced by a slight degassing of the volcanic system.
3. Visual inspection:
During this period, clouds continued to be present in the area near the volcano. Sporadic emissions of water vapor have been recorded which have reached a maximum height of 200 meters above the crater. On the other hand, Mr. Melquiades Álvarez, a member of the Municipality of Ubinas District, made a brief inspection of the volcano crater on 14 April, during which he observed that steam emissions were constant in The crater.

Source : IGP


Sabancaya , Peru :

• On average, 37 explosions per day (greater than the previous week) were recorded with a maximum offset value of 104 cm2. The seismic activity associated with the rise of magma (hybrid earthquakes) increased slightly, while events associated with fluid movements (long-term earthquakes) continue to be reported in large numbers.

• The height of the eruptive ash and ash columns reached ~ 3000 meters above the crater and then spread over more than 40 km to the northwest and south-east.
• The deformation did not show any significant significant change. Minor variations are recorded in the error range of the equipment.
• The volcanic gas stream (SO2) reached a maximum of 4051 tonnes / day on April 16th.
• 11 thermal anomalies were detected, with values between 1 MW and 39 MW of radiated volcanic energy.

Overall volcanic activity shows a slight increase compared to last week. A similar behavior for the next few days is planned.

Source : IGP

Photo : IGP  2014


Fuego , Guatemala :

Activity: vulcanian
Morphology: Stratovolcan composite
Geographical location: 14 ° 28 ’54 ˝ Latitude N; 90 ° 52 ’54 ˝ Longitude O

Altitude 3.763m s m n.
Weather conditions: Partly Cloudy
Wind: West 5 km / h
Rainfall: 12.5 mm.


The bad weather prevented the volcanic cone from being observed. The GR3 seismic station recorded 13 low to moderate explosions that ejected columns of gray ash at heights of 4.300 to 4.400 m (14.105 to 14.435 feet) which scattered 8 to 10 km south and southwest . Incandescent pulses of 25 to 50 m generated moderate avalanches in the south direction, which caused ash falls on Trinidad.

Source : Insivumeh

Recommended Posts

Leave a Comment

Nous contacter

Nous ne sommes pas disponibles pour le moment. Mais vous pouvez nous envoyer un email a l'aide du formulaire ci-dessous.

Not readable? Change text. captcha txt

Start typing and press Enter to search