February 13 , 2018.
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
No significant change. Kīlauea continues to erupt at its summit and from the Puʻu ʻŌʻō vent on its East Rift Zone. This morning, the summit lava lake was 40.5 m (133 ft ft) below the floor of Halemaʻumaʻu crater. Surface lava flow activity continues on the upper portion of the flow field near Puʻu ʻŌʻō, on the pali, and near the base of the pali. Lava is not entering the ocean at this time, and active flows currently pose no threat to nearby communities.
Summit tiltmeters began recording deflationary tilt late last night; this trend continues this morning. When measured this morning, the summit lava lake was 40.5 m (133 ft) below the floor of Halemaʻumaʻu crater, a drop of 4 m (13 ft) from Saturday afternoon. Sulfur dioxide emission rates remain high. Seismicity is at normal levels, with tremor fluctuations related to the vigor of lava lake spattering.
Puʻu ʻŌʻō Observations:
The tiltmeter on Puʻu ʻŌʻō cone has shown little change over the past day. Webcam views overnight show continued glow from a small lava pond on the west side of the crater. The sulfur dioxide emission rate from the East Rift Zone vents remains significantly lower than the summit emission rate.
Lava Flow Observations:
The episode 61g flow is still active, but no lava is flowing into the ocean. Based on web cam views and field reports from over the weekend, surface lava flow activity continues on the upper portion of the flow field near Puʻu ʻŌʻō, on the pali, and near the base of the pali. These lava flows pose no threat to nearby communities at this time.
Source : HVO
Photos : Bruce Omori
Mayon , Philippines :
MAYON VOLCANO BULLETIN 13 February 2018 08:00 A.M.
Mayon’s activity in the past 24 hours was characterized by sporadic and weak lava fountaining, lava flow and degassing from the summit crater. Although the upper slopes were heavily obscured, the seismic record indicated discrete episodes of lava fountaining that lasted three (3) to fifty-five (55) minutes. Throughout the night, lava flows and consequent incandescent rockfalls were observed in the Miisi and Bonga-Buyuan channels. Effused volumes of incandescent lava flows have advanced to 3.3 kilometers, 4.5 kilometers and 900 meters down the Miisi, Bonga and Basud Gullies, respectively, from the summit crater. Pyroclastic density currents or PDCs have deposited to the 4.6, 4.5 and 4.2 kilometer reaches of the Miisi, Bonga and Basud Gullies, respectively.
A total of seventy-six (76) volcanic earthquakes, most of which corresponded to lava fountaining events were recorded by Mayon’s seismic monitoring network. Electronic tilt and continuous GPS still record sustained swelling or inflation of the edifice since November and October 2017, consistent with pressurization by magmatic intrusion.
Alert Level 4 remains in effect over Mayon Volcano. The public is strongly advised to be vigilant and desist from entering the eight (8) kilometer-radius danger zone, and to be additionally vigilant against pyroclastic density currents, lahars and sediment-laden stream flows along channels draining the edifice. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ash from any sudden eruption can be hazardous to aircraft.
DOST-PHIVOLCS maintains close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders.
Source : Phivolcs
Photo : Earl Recamunda
Sabancaya , Peru :
The explosive activity remains similar to that of the previous week, averaging 18 explosions per day. Events associated with fluid movements (Long Period type) and ash emissions (Tremor) continue to predominate. The earthquakes associated with the rise of the magma (type Hybrids) remain low in number and energy .
The eruptive columns of gas and ash remained similar to the previous week, reaching a maximum height of 3900 m above the crater. The dispersion of these materials occurred within a radius of about 50 km, mainly to the South, South-East, South-West and North-West.
Deformation monitoring at the SBSS GNSS station shows deflation as of 7 February.
The volcanic gas (SO2) flux recorded on February 10 has a maximum value of 2062 tonnes / day, a value considered large.
Three thermal anomalies were recorded according to the MIROVA system, with values ranging between 1 MW and 10 MW VRP (Radiated Volcano Power).
In general, eruptive activity maintains moderate levels. No major changes are expected in the coming days.
Source : IGP
Agung , Indonesia:
Based on the analysis of visual and seismic data and considering the potential threats of danger, the status of G. Agung was lowered from Level IV (Awas) to Level III (Siaga) on February 10, 2018 at 09:00. Since yesterday and until today visually the volcano is usually covered with fog. The emission of white fumes, low intensity and low pressure, reaches a height of 200 to 400m above the summit. The wind is heading east.
Seismograph records as of February 12, 2018 noted:
7 emission earthquakes
1 shallow volcanic earthquake (VB)
1 deep volcanic earthquake (VA)
1 local tectonic earthquake (TL)
1 harmonic tremor.
As of February 13, 2018 (00:00 to 18:00) it has been registered:
1 shallow volcanic earthquakes (VB)
1 deep volcanic earthquake (VA)
The communities around G. Agung and mountaineers / visitors / tourists should not climb, climb or do any activity in the danger zone around the G. Agung crater area and in all areas within 4 km from the crater of G. Agung. The estimated area risks are dynamic and continuously assessed and can be modified at any time based on the most recent observational data from G. Agung.
Level 3 (SIAGA) is only valid for a radius of 4 km as mentioned above. Outside the activity area, everything can work like NORMAL and always SAFE.
VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA.
Issued: February 13 , 2018.
Volcano: Agung (264020)
Current Aviation Colour Code: ORANGE
Previous Aviation Colour Code: orange
Source: Agung Volcano Observatory
Notice Number: 2018AGU15
Volcano Location: S 08 deg 20 min 31 sec E 115 deg 30 min 29 sec
Area: Bali, Indonesia
Summit Elevation: 10054 FT (3142 M)
Volcanic Activity Summary:
Eruption with volcanic ash cloud at 03h49 UTC (11h49 local). Eruption and ash emission is not continuing.
Volcanic Cloud Height:
Best estimate of ash-cloud top is around 14854 FT (4642 M) above sea level, may be higher than what can be observed clearly. Source of height data: ground observer.
Other Volcanic Cloud Information:
Ash-cloud moving to East
Seismic activity is dominated by low-frequency earthquakes related to steam and gas emission on the crater. Some high-frequency volcanic earthquakes are still recorded, indicating that magma movement inside the volcano remains active, however with low intensity.
Sources : Magma , VSI .