April 01 , 2017. EN. Bogoslof , Villarica , Kilauea , Santiaguito .

Home / Alaska / April 01 , 2017. EN. Bogoslof , Villarica , Kilauea , Santiaguito .

April 01 , 2017. EN. Bogoslof , Villarica , Kilauea , Santiaguito .

April 01 , 2017.


Bogoslof , Aleutians Islands , Alaska :

53°55’38 » N 168°2’4″ W,
Summit Elevation 492 ft (150 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Bogoslof volcano continues to be relatively quiet this week. AVO has not detected any significant seismic or infrasound activity. Weakly elevated surface temperatures have been observed in satellite data on four days this week, likely related to heat given off by the warm crater lake above the active eruption site. The last major explosive event occurred on March 8, 2017 and occasional high-spatial resolution satellite images show no significant surficial changes due to eruptive activity since that time.


AVO Image

Comparison of Bogoslof Island before the 2016-17 eruption to March 11, 2017 configuration. As of March 7-8, 2017, there have been 36 eruptive events since Dec. 12, 2016. Main geographic points of reference are labelled in each image and point A is the same in both images. Image data provided under Digital Globe NextView License.

Partial seismic network outages from nearby Umnak Island since mid-February have reduced AVO’s seismic monitoring capabilities, limiting our ability to forecast or rapidly characterize Bogoslof activity. AVO continues to use infrasound (pressure) sensors from Umnak Island and will rely on seismic data from Unalaska Island to monitor Bogoslof, which will still allow for timely detection of significant activity. In addition, we use satellite imagery to track ash clouds and information from the Worldwide Lightning Location Network to identify volcanic lightning. Although we are able to detect significant explosive activity in real-time, there is typically a lag of tens of minutes until we can characterize the magnitude of the event and the altitude of the volcanic cloud.


Source : AVO

Photo : Waythomas, Chris


Villarica , Chile :

Special volcanic activity report (REAV)
Region of Araucania and Los Lagos, 31 March 2017, 15:53 (local time).

The National Geology and Mining Service (SERNAGEOMIN) provides the following information, information obtained by the National Network monitoring teams of volcanic vigilance, processed and analyzed in the Volcanological Observatory of Southern Andes, interpretation center data of Surveillance of SERNAGEOMIN:

Friday 31 March 2017 at 03:53 hours local time (06:53 GMT), the monitoring stations installed near the Villarrica volcano recorded one (1) earthquake associated with rock fracturing (volcano-tectonics). The event was located 3.4 km east (E) of the Villarrica crater.


The location was obtained as follows:

TIME OF ORIGIN: 03:53 hl (GMT -3)
LATITUDE: 39 ° 25’25.80 « S
LONGITUDE: 71 ° 53’58.80 « O
DEPTH: 3.51 km
Local Magnitude 3.9 (ML)

At the time of this report, there were two smaller events. There is no information from authorities or communities on the perception of events in neighboring regions.
The volcanic alert remains at the technical level GREEN.
SERNAGEOMIN will continue to monitor online and report any changes in volcanic activity in the region in good time.



Photo : Seba G Tuzunza


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

Activity Summary:
Kīlauea Volcano continues to erupt at the summit and the Puʻu ʻŌʻō vent on its East Rift Zone. The episode 61g lava flow from Puʻu ʻŌʻō in the East Rift Zone is entering the ocean at Kamokuna, where a small lava delta has begun to form. Surface flows from a March 5 breakout are still active above the pali and on the coastal plain. These lava flows pose no threat to nearby communities at this time. The lava lake surface is approximately 14 m (46 ft.) below the floor of Halemaʻumaʻu Crater as of this morning.

Summit Observations:
Tiltmeters at Kīlauea’s summit recorded a slight inflationary tilt. The lava lake surface is approximately 14 m (46 ft.) below the rim of the Overlook Vent, when measured this morning, same as yesterday. Webcam views of the lava lake can be found at this webpage: http://hvo.wr.usgs.gov/cams/region_kism.php. Seismicity is within normal, background rates with tremor fluctuations associated with lava lake spattering. Average daily summit sulfur dioxide emission rates ranged from 3,700 and 5,300 metric tons/day over the past week.

Puʻu ʻŌʻō Observations:
Webcam images over the past 24 hours show persistent glow at long-term sources within the crater and from a small lava pond on the west side of the crater. There were no significant changes in seismicity over the past 24 hours. The tiltmeter is recording flat tilt trend. The sulfur dioxide emission rate from all East Rift Zone vents was about 250 metric tons/day when last measured on February 22, 2017.

The episode 61g flow continues to enter the ocean at the Kamokuna ocean entry (center), and was producing a robust plume. The western Kamokuna delta, which was abandoned in late September 2016, is visible to the left of the entry. A few weak surface breakouts were still active on the coastal plain, but most surface activity is within approximately 3.5 km (2.2 miles) of the vent. The episode 61g tube is marked by fume traces that can be seen along the flow field, and Puʻu ʻŌʻō is visible in the center of the skyline.

Lava Flow Observations:
The episode 61g flow is still active and entering the ocean at Kamokuna, where a small delta has begun to form. NPS eruption crew estimates its dimensions are approximately 40 m wide by 100 m long (130 ft by 328 ft). At Puʻu ʻŌʻō, flows on the upper portion of the flow field that began on March 5, continues to advance downslope and produce surface flows above the pali. Small, short-lived breakouts have been reported on the coastal plain, but are not clearly visible in webcam images. None of these flows poses any threat to nearby communities at this time.

Source : HVO

Photos : Bruce Omori , HVO


Santiaguito , Guatemala :

Activity type: Pelean
Morphology: Complex of dacitic domes.
Geographical location: 14 ° 44 ’33 ˝ latitude N; 91 ° 34’13˝ longitude W.
Height: 2,500msnm.
Current conditions: Wind: South 2 km / hr
Precipitation: 0.0 mm.

The active dome has a degassing of the crater that maintains a white plume at a height of about 3,000 m (9,842 feet) scattered to the southwest. Low explosions are reported, white in color, with columns rising slowly from 3,000 to 3,200 meters (9,842 to 10,498 feet), moving southwest. Low avalanches are noted on the dome.

Source : Insivumeh .

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