August 30, 2016. EN. Katla , Santiaguito , Nevado Del Ruiz , Reventador .

Home / blog georges Vitton / August 30, 2016. EN. Katla , Santiaguito , Nevado Del Ruiz , Reventador .

August 30, 2016. EN. Katla , Santiaguito , Nevado Del Ruiz , Reventador .

August 30, 2016.

 

Katla , Iceland  :

Two earthquakes of magnitude M4,6 and M4,5  struck the volcano Katla, under the Mýrdalsjökull glacier, last night, followed by a series of aftershocks. These are the largest earthquakes that hit the Katla since 1977, when an  earthquake of M5,1 was measured.

katla

Two earthquake swarms occurred in the caldera of Katla last night. The first occurred around 1:30 and was composed of ten earthquakes, the largest of which was to magnitude M2,4. The earthquakes of M4.6 and  M4,5 were part of the second earthquake swarm that started at 1:41. The region has been rather quiet since, according to the reports of ruv.is.

The specialist in natural risks to Iceland Met Office Sigurdís Björg Jonasdottir said that there are no indications of volcanic activity, or glacial outburst flood. The activity in the caldera of Katla is limited to seismicity.
Katla has erupted for the last time in 1918, causing dangerous flooding and ash fall. Scientists monitor the developments of this volcano closely.

 

An earthquake of magnitude 3.4 was detected just north of Grindavík at 17:51 and was felt by locals.

This night on 29 August at 01:41 an earthquake swarm started within the Katla caldera. Two earthquakes were over M4. The largest earthquake occurred at 01:47:02 M4.5 and another one 20 seconds later, M4.6. The largest earthquakes were felt in the area. About 20 aftershocks have been recorded. No tremor has been seen. About 40 earthquakes have been detected within the Katla caldera from midnight. Most of them occurred before 3 AM. The largest earthquke since then had a magnitude M3.3 at 15:12.

Glacial water is flowing into Múlakvísl river, south of Mýrdalsjökull. Increased conductivity has been measured in the river and gas measurements in the area show high concentrations of sulfur dioxide and hydrogen sulfide. People are advised not to travel near the river, due to gas pollution. It is not uncommon for glacial water to flow into Múlakvísl, causing increased conductivity and gas pollution.

According to local reports, the level of the Bláfjallakvísl glacial river is unusually high. Bláfjallakvísl originates from the northern side of Mýrdalsjökull and people are advised to show caution when crossing the river.

 

Source : icelandreview, IMO .

Photo : Dagur Bragason

 

Santiaguito , Guatemala :

The Stg3 station, of the Observatoire of the Santiaguito volcano, is currently recording a moderate Lahar, which can increase in volume in the next few minutes.
He descends the Angel Cabello River, a tributary of the river Nima I, hot, carrying a stream containing recent volcanic pyroclastic materials, residual of the recent eruptions of Santiaguito.
Rains have intensified in recent days in the volcanic area, generating this hot lahar, which descended with a width of 25 meters and a height of 1.5 meters, with a strong smell of sulfur on its way, with blocks from 1 to 1.5 meters in diameter, abundant pasty materials, trunks and branches of trees, falling in waves.

santiaguito

Therefore, INSIVUMEH recommends:

At CONRED,
To take precautions deemed necessary , especially in areas near the Samala river and river Nima 1, also take into account that heavy rains can cause lahar by Tambor River.
At the General Directorate of Roads,
to take precautions at the height of the bridge Castillo Armas and the Vuelta del Niño, as there is a risk of exceeding as happened in previous years.

 

Source : Insivumeh.

Photo :  Eddy Maldonado

 

Nevado Del Ruiz , Colombia :

For the third day successively , the Colombian Geological Service informs the authorities and the communities that the Nevado Del Ruiz volcano continues to record signals associated with gas emissions in the atmosphere, up to 1500 m above the summit of the volcano, as was recorded by surveillance cameras. These signals are shown several times during the day, without being checked visually.

nevado del ruiz

It can not be excluded ash fall on the populations on the path of prevailing winds, currently to the Northwest, on the cities of Manizales, Villamaria, Chinchina, and others.

The Colombian Geological Service remains attentive and follows the evolution of the volcanic phenomenon and report on changes that may occur.

 

Source : SGC.

Photo : Archive SGC

 

Reventador , Ecuador :

 Activity bulletin of the Reventador volcano: Monday, August 29, 2016

SUMMARY OF THE ACTIVITIES OF VOLCANO
The volcano is maintained with high eruptive activity.
At the end of the afternoon yesterday, it was possible to see the volcano, however, it was not observed activity on its surface.
Earlier today, an explosion was observed, with a projection of incandescent blocks to 800 m below the crater level on the southwest flank.
During the morning, the volcano sector has darkened.

 

reventador

TECHNICAL AND OBSERVATIONS APPENDIX
Seismicity:
From 11:00 (TL) yesterday until 11:00 (TL) today, it was recorded one explosions   (EXP), 1 long period event (LP), 1  episodes of tremor emission (TRE) and 1 episodes of tremor harmonic (TRA).
Observations of emissions and ashes:
At the end of the afternoon yesterday, it was possible to see the volcano, however, it was not observed activity on its surface.
Earlier today, an explosion was observed, with a projection of incandescent blocks to 800 m below the crater level on the southwest flank.
During the morning, the volcano sector has darkened.

Rain and lahars:
There was no rain in the area.

GENERAL INFORMATION

This report on a daily basis will be published at 12:00 (TL). In the case of an increase or a change in the behavior of the volcano, it will immediately issued a special report.

 

Source : IGEPN

Photo : Hosteria

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