May 05 , 2017. EN. Misti , San Miguel (Chaparrastique ) , Kilauea , Poas , Fuego .

Home / blog georges Vitton / May 05 , 2017. EN. Misti , San Miguel (Chaparrastique ) , Kilauea , Poas , Fuego .

May 05 , 2017. EN. Misti , San Miguel (Chaparrastique ) , Kilauea , Poas , Fuego .

May 05 , 2017.

 

Misti , Peru :

Sismo – volcanic monitoring:
The seismic activity on the Misti volcano remains at low levels.
VT-type earthquakes, related to the fracturing of rocks inside the volcano, have maintained the recording of 42 events per day, which is considered normal. Moreover, the energy levels of the VT events are low.
Tremor events, linked to continuous vibrations associated with fluid dynamics (gas and water vapor) that maintained high activity in the previous period, were recorded with the same intensity until April 5th, with an average of 20 hours a day. During the rest of the month (06-30 April), tremor activity remained at low levels, recording about 12 minutes per day.

Satellite Surveillance:
Thermal anomalies: The Mirova system (www.mirova.unito.it) of the University of Turin (Italy) did not detect any thermal anomalies on the Misti volcano during this period (VPR = 0 Megawatts).
SO2 Anomalies: The GSDM-NASA « EOS Aura » satellite system (http://so2.gsfc.nasa.gov/) did not detect any significant anomalies of SO2 (magma gas) density on the Misti volcano .

Conclusions:
The volcanic activity of the Misti volcano remains weak.
VT – type events remain at normal levels, with an average rate of 42 earthquakes per day, whereas Tremor – type activity has decreased since 6 April; At present, this type of seismicity has recorded 12 minutes per day.
No thermal anomalies or high values of SO2 gas density were detected on the Misti volcano.

 

Source : IGP

 

San Miguel ( Chaparrastique ) El Salvador :

Special Report No. 8
The volcanic activity of the Chaparrastic tends to decrease:
Date and time of publication: 03/05/2017 14:20:00

During the last five days the activity of the Chaparrastic Volcano has tended to decrease. Seismic vibration parameters of the volcano oscillated between 50 and 173 RSAM units (average per hour). Similarly, sulfur dioxide (SO2) emissions have also decreased.
However, fluid movements remain within the volcanic system, which are evident in the periodic degassing cycles produced in the central crater.

During the last 24 hours, the vibration of the volcano fluctuated between 50 and 113 RSAM units (average per hour), and the usual range is from 50 to 150 RSAM units [Figure 1].

 

 

 

Figure 1. So far, seismic vibrations of the volcano in May have been on a downward trend

During April, sulfur dioxide (SO2) emissions ranged from 68 to 809 tonnes per day. These values are considered to be significant and characteristic of an open active volcanic conduit system with injections of magmatic fluids.

The behavior of the gas flow and seismic vibrations of the volcano are shown in Figure 2. It is likely that low levels of SO2 are due to the wind direction has changed and, therefore, went out of range of monitoring equipment.

 

 

Figure 2. In recent days, the flow of SO2 emitted by the volcano has shown a downward trend, such as RSAM vibration values.

The images captured by the surveillance camera located on the volcano El Pacayal was in the clouds, which prevented from seeing in detail the activity of the volcano.
However, it has been found that the Chaparrastic emitted pulses of sulphurous gases, through its central crater, and is likely to exhibit sudden changes in its behavior.

 

The Ministry of the Environment and Natural Resources (MARN) is pursuing its enhanced surveillance system and maintains enhanced communication with the Directorate General of Civil Protection and local observers.
On the other hand, the MARN calls people to stay away from the summit of the Chaparrastic volcano because of the degree of danger it represents.

The next data update will take place on Friday, May 5, 2017. If significant changes occur, a special report will be issued.

 

Source : Marn

 

Kilauea , Hawai :

HAWAII VOLCANOES NATIONAL PARK – USGS scientists say the collapse is a reminder of the dangers present at the Kamokuna lava ocean entry.
(BIVN) – Scientists have confirmed another delta collapse has occurred at the Kamokuna lava ocean entry along the cliffs of Hawaii Volcanoes National Park.

“On May 3, the front section of the Kamokuna lava delta collapsed into the sea,” the USGS Hawaiian Volcano Observatory wrote today, saying it is “a reminder that new land created by ocean entries is highly unstable and prone to collapse without warning.”

 

(USGS) This image shows the lava delta at 7:50 a.m. HST, a couple of hours before the collapse.

One of the first to report the delta collapse was Captain Shane Turpin aboard the Lava Ocean Tours boat. Turpin shared some before and after video, as well as some photos of the lava flow taken just before the collapse (see image above).

By land, John Tarson of Epic Lava Tours also reported seeing changes on the delta during recent trips to the ocean entry.

 

(USGS) Within five minutes, between 9:55 and 10:00 a.m. HST, nearly the entire delta disappeared, collapsing into the sea. The collapsed area cut back toward the sea cliff, past the largest crack on the delta. In this image, captured at 10:05 a.m., the seawater is brown and turbulent. Large blocks of steaming rocks are visible on top of a narrow slice of the remaining delta (center). These rocks were likely washed ashore by a small, localized tsunami generated by the collapse. During the next few hours, small pieces of the remnant delta continued to flake off and disappear into the ocean.

 

HVO scientists were out on the flow field today to observe the changes firsthand. UPDATE: USGS uploaded these photos captured by a time-lapse camera. The sequence of events was recorded in five-minute intervals.
The episode 61g flow is still active, USGS says. The lava is entering the ocean, and was slowly building a lava delta at Kamokuna. The flows pose no threat to nearby communities at this time.

Source : BIVN

Photos : Usgs , David Ford

 

Poas , Costa Rica :

Poas Volcano Activity Report, May 4, 2017, updated at 11:00 AM

  Volcanic activity in the last 24 hours:
During the last 24 hours, a number of discrete LPS and VTs events have been observed on the seismograms, interleaved with a tremor of variable amplitudes, weak to moderate. The RSN camera showed a series of small water eruptions, consisting of water, gas and fine particle emissions from the main crater lake. But often the aircraft was covered by clouds and / or emissions and visibility was low.
During the day, the plume was scattered mainly westward.

 

Yesterday, OVSICORI staff was on the volcano to assess the situation and to keep the instruments accessible.

In the current Poas volcano eruptions, more short – term eruptions are to be expected. The OVSICORI-A remains vigilant on volcanic activity and will publish periodic reports on the evolution of its behavior and at each important changes.

Source : Ovsicori

 

Fuego , Guatemala :

SPECIAL BULLETIN volcanology, Guatemala 4 May 2017, 21:30 (Local Time)
INCREASE IN ACTIVITY.

The activity of the volcano Fuego, continues at a high level of activity. This morning, lava flows have been reported in Santa Teresa Canyon, which reaches 1000 meters in length and continues to progress. At the moment, another lava flow descends into the Canyon Las Lajas, with a length of 2 kilometers. With regard to the activity generated by the explosions, it is maintained in a range of 7 to 12 per hour, moderate to strong , The ashes being expelled with heights of 4,900 meters (16,076 feet) and traveling west – southwest of the volcanic complex over a distance of 15 kilometers. Fine particles of ash fell on the villages of Morelia, Hagia Sophia, Panimache I and II, El Porvenir and San Pedro Yepocapa.

 


This activity is accompanied by weak to moderate rumblings, shock waves and sounds similar to locomotives. The upward trend is maintained, so there is a chance that in the next few hours the eruption may become No. 4 of the year, so it is recommended to keep abreast of the evolution of the activity of the Fuego volcano.

Source : Insivumeh

Photo : EFE

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