January 14 , 2018. EN . Mayon , Kilauea , Dukono , Piton de la Fournaise .

Home / blog georges Vitton / January 14 , 2018. EN . Mayon , Kilauea , Dukono , Piton de la Fournaise .

January 14 , 2018. EN . Mayon , Kilauea , Dukono , Piton de la Fournaise .

January 14 ,  2018.

 

Mayon , Philippines :

MAYON VOLCANO BULLETIN 14 January 2018 8:00 A.M.

Mayon Volcano’s seismic monitoring network recorded seventy-eight (78) rockfall events during the past 24 hours. Degassing at the active vents could not be observed due to thick clouds covering the summit. At 4:21 PM yesterday, Mayon Volcano generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2500 m high that was drifted to the southwest. Based on seismic records the activity lasted approximately 1 hour and 47 minutes. Traces of ash fell on Barangays Anoling, Sua, Quirangay, Tumpa, Ilawod and Salugan of Camalig and in Barangays Tandarora, Maninila and Travesia in Guinobatan. Sulfuric odor was noted by residents of Camalig town proper. Rumbling sounds were heard by residents of Brgy. Anoling, Camalig. Faint crater glow has been first observed at 10:16 PM. Precise leveling data obtained on November 7 to 11, 2017 indicated slight inflation of the edifice relative to September 2017. This is also exhibited in increased rates in the inflationary trends recorded by continuous GPS and tilt since October and November 2017, respectively. Sulfur dioxide (SO2) emission was measured at an average of 856 tonnes/day on 03 December 2017.

MAYON VOLCANO BULLETIN 14 January 2018 10:50 AM

Another phreatic eruption occurred today at Mayon Volcano in Albay. This began at 8:49 am and lasted approximately 5 minutes based on seismic record. The event produced a grayish steam and ash plume that was largely obscured by summit clouds. Sulfurous odor was detected and rumbling sounds were heard by residents of Brgy. Anoling, Camalig.

 

MAYON VOLCANO BULLETIN 14 January 2018 12:30 AM

This serves as a notice for the raising of Mayon Volcano’s status from Alert Level 1 (abnormal) to Alert Level 2 (increasing unrest).
Mayon Volcano in Albay Province generated a phreatic eruption (steam-driven) that propelled a grayish steam and ash plume approximately 2500 m high that was drifted to the southwest. Based on seismic records the activity started around 4:21 PM of January 13, 2018 and lasted approximately 1 hour and 47 minutes.   This indicates the pressurization of the volcano by the rise of the magma or the disturbance of the underground hydrothermal system of Mayon.

In view thereof, DOST-PHIVOLCS is raising the Alert Level of Mayon Volcano from Alert Level 1 (abnormal) to Alert Level 2 (increasing unrest). This means that current unrest is probably of magmatic origin, which could lead to more phreatic eruptions or eventually to hazardous magmatic eruptions. The public is strongly advised to be vigilant and desist from entering the six (6) kilometer-radius Permanent Danger Zone (PDZ) to minimize risks from sudden explosions, rockfall and landslides. In case of ash fall events, which are most likely to affect communities on the western and southwestern flanks downwind of Mayon’s crater, people should cover their nose and mouth with damp, clean cloth or dust mask. 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. Based on the seasonal wind pattern, ash fall events may most likely occur on the southwest side of the volcano. DOST-PHIVOLCS maintains close monitoring of Mayon Volcano and any new development will be communicated to all concerned stakeholders.

Provincial disaster officials in Albay ordered the immediate evacuation of residents from 16 villages at the foot of the volcano.
The head of the public security and emergency bureau of Albay, Cedric Daep, announced that the people came from the municipalities of Daraga, Camalig, Guinobatan, Malilipot, the city of Tabaco and the city of Ligao.
Evacuees will be housed in public primary schools designated by local government units in the corresponding cities.

Source : Phivolcs

Photos : Christopher Dy-Liacco Flores , Joey Sarte Salceda.

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:
No significant change. Lava is not entering the ocean at this time. Kīlauea continues to erupt at its summit and from the Puʻu ʻŌʻō vent on its East Rift Zone. The episode 61g lava flow is producing scattered surface flow activity. Active lava flows pose no threat to nearby communities at this time. This morning, the surface of the lava lake at the Kīlauea summit was roughly 33 m (108 ft) below the floor of Halemaʻumaʻu. Inflation continued over the past day, and there have been no significant changes in seismicity or gas release across the volcano.

Summit Observations:
Summit tiltmeters recorded continued inflationary tilt over the past day, and the lake level rose slightly. This morning the lake was roughly 33 m (108 ft) below the floor of Halemaʻumaʻu. Sulfur dioxide emission rates remain high. Seismicity is at normal levels, with tremor fluctuations related to lava lake spattering.

Puʻu ʻŌʻō Observations:
No significant changes are evident at Puʻu ʻŌʻō. The sulfur dioxide emission rate from the East Rift Zone vents has been steady over the past several months and 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. Surface lava flow activity persists on the upper portion of the flow field, on the pali, and in scattered areas along the coastal plain. These lava flows pose no threat to nearby communities at this time.

Source : HVO

Photos : Bruce Omori.

 

Dukono , Indonesia :

VOLCANO OBSERVATORY NOTICE FOR AVIATION – VONA.

Issued: January 12 , 2018.
Volcano: Dukono (268010)
Current Aviation Colour Code: ORANGE
Previous Aviation Colour Code: orange
Source: Dukono Volcano Observatory
Notice Number: 2018DUK07
Volcano Location: N 01 deg 41 min 35 sec E 127 deg 53 min 38 sec
Area: North Maluku, Indonesia
Summit Elevation:3933 FT (1229 M)

Volcanic Activity Summary:
Eruption with volcanic ash cloud at 21h57 UTC (06h57 local).

Volcanic Cloud Height:
Best estimate of ash-cloud top is around 4893 FT (1529 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 southwest.

Remarks:
Eruption and ash emission is continuing.

 

Activity Level of Level II (WASPADA). The Dukono (1229 m above sea level) has a continuous eruption. Since yesterday until this morning, visually, the summit of the volcano can be observed clearly until it is covered with fog. The smoke emitted from the crater is white / gray, of medium thickness and rises from 700 to 800 m. The wind is blowing weakly towards the West.

The seismographs, dated January 12, 2018, recorded:
Ash emissions associated with continuous tremors with an amplitude of 0.5 to 10 mm (dominant 2 mm).
3 earthquakes of eruption.
No deep volcanic earthquakes (VA).
No local tectonic earthquake (TL).
There was no rumbling heard from the Dukono Post, 10 km north of the summit.

Recommendation: The communities around G. Dukono and visitors / tourists should not move, climb or approach the Malupang Warirang crater within 2 km.

Sources : VSI , Magma .

Photo : Sylvain Chermette  / 80 jours voyage.

 

Piton de la Fournaise , La Réunion :

21 ° 14’38 « S
55 ° 42’29 « E
Altitude: 2632m
Alert level: Vigilance.

Seismology
– Number of landslides of 13-01-2018: 5

Areas affected by landslides: Summit cone, Enclos.
– Number of volcano-tectonic earthquakes (VT) from 13-01-2018: 0
– Volcanano-tectonic earthquake of greater magnitude of 13-01-2018:
Duration: 0 s
Duration Magnitude: 0.00

Location of earthquakes over 2 months. Only localizable earthquakes have been represented on the map.
The observatory records seismic events not shown on this map because they are not localizable due to their low magnitude.
To see the number of earthquakes detected by the Observatory’s networks, you can refer to its last Activity Bulletin.

Deformities:
– The GPS of the summit zone record an inflation, witness of the putting in pressure of a superficial source.
– GPS in the far field record inflation, witnessing the setting in pressure of a deep source.

Illustration of the summit deformation over 2 months. Here is shown a baseline (variation of distance between two GPS receivers) crossing the crater Dolomieu (see location). A rise is synonymous with elongation and therefore swelling of the volcano; conversely, a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions.

Geochemistry:
Low concentrations of H2S (coupled with water vapor) and SO2 (coupled with CO2) in the summit emissions of Piton de la Fournaise.
Further information:
The high inflation currently observed in the Piton de la Fournaise summit zone could be linked to hydrothermal activity following heavy rains in recent days.

Source : OVPF

 

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