August 04 , 2016. EN. Guallatiri , Kilauea , Nevados de Chillan , Brava Island .
August 04 , 2016.
Guallatiri , Chile :
Special volcanic activity report (REAV)
Region Arica y Parinacota
2 August 2016 08: 30 hours (local time).
The National Service of Geology and Mining (SERNAGEOMIN) describes the following information obtained by monitoring equipment processed and analyzed by the Volcanological Observatory of Southern Andes, on the interpretation of the data center monitoring of the National Network for the Guallatiri volcano:
Tuesday, August 2, 2016 at 07: 45 local time (11: 45GMT), the monitoring stations installed near the Guallatiri volcano recorded one (1) earthquake associated with rock fracturing (Volcano–tectonic) . The event was located 6 km to the south (S) of the main crater.
The location obtained was as follows:
ORIGIN TIME: 07: 45 hl (UTC -4)
LATITUDE: 18 ° 28’37’20 « South, LONGITUDE: 69 ° 5’14’40 » West
LOCAL MAGNITUDE 3.0 (ML)
At the time of publication of this report, there were five aftershocks of lesser magnitude. There is no information from the authorities or the community, about the perception of these events in neighboring areas.
The level of technical volcanic alert remains at green.
SERNAGEOMIN continuous online monitoring and report timely to the changes of volcanic activity in the region.
One of northern Chile’s most active volcanoes, Volcán Guallatiri is a symmetrical ice-clad stratovolcano at the SW end of the Nevados de Quimsachata volcano group. The 6071-m-high Guallatiri lies just west of the border with Bolivia and is capped by a central dacitic dome or lava complex, with the active vent situated at its southern side. Thick lava flows are prominent on the lower northern and western flanks of the andesitic-to-rhyolitic volcano. Minor explosive eruptions have been reported from Guallatiri since the beginning of the 19th century. Intense fumarolic activity with « jet-like » noises continues, and numerous solfataras extend more than 300 m down the west flank.
Source : Sernageomin , GVP.
Kilauea , Hawai :
19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE
Eruptions continue at Kilauea Volcano’s summit and East Rift Zone. The 61G lava flow extending southeast of Pu’u ‘O’o continues its Kamokuna ocean entry, as well as scattered breakouts on the coastal plain. The flow poses no threat to nearby communities. The lava lake at Halema’uma’u Crater continues to be active with a current height of 36 m (118 ft) below the Overlook crater rim. Seismicity and deformation rates remain at background levels throughout the volcano.
The lava lake within the Halema’uma’u Overlook crater continues to be active, with a current height of 36 m (118 ft) below the crater rim. Tiltmeters at Kilauea’s summit transitioned from inflationary to deflationary tilt at about 11am HST yesterday. This is consistent with moving from the inflationary portion of one DI event into the deflationary portion and another. The net trend recorded by summit tiltmeters, despite occasional DI events, has been one of minor inflation. Seismicity is within normal, background rates with tremor fluctuations associated with lava lake spattering. The average daily summit sulfur dioxide emission rate ranged from 4,000 to 6,000 metric tons/day over the past week.
Pu’u ‘O’o Observations:
Webcam images over the past 24 hours show persistent glow at long-term sources within the crater. No significant changes in seismicity or tilt were recorded over the past 24 hours. The sulfur dioxide emission rate from all East Rift Zone vents was about 410 metric tons/day when last measured on July 28.
Lava Flow Observations:
The 61G lava flow extending southeast of Pu’u ‘O’o towards the coastal plain on Kilauea’s south flank remains active, with nearly all surface breakouts limited to the coastal plain. Lava continues to flow into the ocean at the Kamokuna ocean entry. The western portion of the ocean entry was not active during observations yesterday, such that its span was narrowed to about 150 m (492 ft) since July 29. Nonetheless, the area around the entire 240 m (787 ft) span that has been active since the ocean entry began still presents a significant hazard to visitors (see below).
As a strong caution to visitors viewing the new ocean entry (location where lava meets the sea) for Flow 61G, there are additional significant hazards besides walking on uneven surfaces and around unstable, extremely steep sea cliffs. Venturing too close to an ocean entry exposes you to flying debris created by the explosive interaction between lava and water. Also, the new land created is unstable because it is built on unconsolidated lava fragments and sand. This loose material can easily be eroded away by surf causing the new land to become unsupported and slide into the sea. Finally, the interaction of lava with the ocean creates an acidic plume laden with fine volcanic particles that can irritate the skin, eyes, and lungs.
Source : HVO
Photos : Sean King .
Nevados de Chillan , Chile :
New eruptive pulse on the Nevados de Chillán volcano.
The incident occurred about 16 hours and the experts have analyzed because of a massive increase in energy located in the Bio-Bio region.
For its part, the National Service of Geology and Mining (SERNAGEOMIN) said that the issue of ashes lasted about 10 minutes due to the instability of the volcano.
This volcano of 3,216 meters above the sea level had its last eruption in 1973, since the 31 December is at yellow alert level, which prohibits approaching within two kilometers of the volcanic edifice .
« The Nevados de Chillán volcanic complex continues its activity with intermittent pulses of volcanic ash (rock particles), accompanied to minor and transient increases in seismic activity. It maintains the yellow alert and the access restriction to a radius of 2 kilometers around the active crater. «
Source : Sernageomin , Sherine France.
Brava Island, Cape Verde:
Notice: Statement on the developments of the seismic activity on the island of Brava, Cape Verde Government · Wednesday, August 3, 2016.
Given the elements that are constantly monitored by the competent national institutions, with the help of international counterparts partners , it was reported the following status:
1. The situation of the recorded seismic activity tended to progress with a significant reduction, with twenty-two seismic events, unlike thousand events of the night. This according to a cyclical part of demonstrations with peaks like that felt in the evening of 2 August.
2. The need to maintain vigilance, given that the study continues, with the field presence of a team of four volcanologists, whose opinion will take a decision as soon as possible, on maintaining the situation of evacuation decided yesterday.
3. Currently an updated survey of the conditions and resources needed to respond to any situation that may occur on the island of Brava, including access, means of mobility and evacuation.
4. State of preparation and warning, the Navy, the Coast Guard and the National Merchant Marine, but also the international partners who have expressed any willingness to support Cape Verde, with means that can be activated in a short period of time.
5. The Cabinet of crisis remain in office for the entire duration deemed necessary and will ensure daily communication in the country.
Praia, August 3, 2016.
Source : Gouv. Cap Vert.