September 17 , 2016. EN. Bulusan , Piton de la Fournaise , Kilauea .

Home / blog georges Vitton / September 17 , 2016. EN. Bulusan , Piton de la Fournaise , Kilauea .

September 17 , 2016. EN. Bulusan , Piton de la Fournaise , Kilauea .

September 17 , 2016.

 

Bulusan , Philippines :

BULUSAN VOLCANO BULLETIN 16 September 2016 6:00 P.M.

Bulusan Volcano (12.7667°N, 124.0500°E) generated a steam-driven explosion at 4:54 P.M. today. The event lasted for approximately 4 minutes based on the seismic record and produced approximately 1500 meter-high dark gray ash plume that drifted towards the northeast.

BULUSAN VOLCANO BULLETIN 17 September 2016 8:00 P.M.

Bulusan Volcano (12.7667°N, 124.0500°E) generated a steam-driven explosion accompanied by rumbling sound at 4:54 P.M. yesterday September 16, 2016. The event lasted for approximately 4 minutes based on the seismic record and produced approximately 1500 meter-high dark gray ash plume that drifted towards the northeast. Ash fall was reported in the municipalities of Casiguran, Gubat, and Barcelona.

In the past 24 hours, Bulusan Volcano’s seismic monitoring network recorded six (6) volcanic earthquakes including the explosion-type earthquake yesterday. However, steaming activity could not be observed due to thick clouds covering the summit. Precise leveling data obtained on August 16-25, 2016 indicated slight inflationary changes of the edifice relative to May 2016. Moreover, ground deformation data from continuous GPS measurements as of 03 September 2016 showed inflationary trends since July 2016.

 

Alert Level 1 (abnormal) remains in effect over Bulusan Volcano. This indicates that hydrothermal processes are underway beneath the volcano that may lead to more steam-driven eruptions. The local government units and the public are reminded that entry to the 4-kilometer radius Permanent Danger Zone (PDZ) is strictly prohibited due to the possibility of sudden and hazardous steam-driven or phreatic eruptions. Civil aviation authorities must also advise pilots to avoid flying close to the volcano’s summit as ash from any sudden phreatic eruption can be hazardous to aircraft.

Source : Phivolcs

 

Piton de la Fournaise , La Réunion :

The eruption that began on 11 September at 8:41 (local time) continues. Despite some fluctuations, the volcanic tremor (indicator of eruptive intensity on the surface) is relatively stable since September 14. Remember that the evolution of this parameter downward as well as rise, can change quickly depending on the depth feeding variations.

Figure 1: Evolution of the RSAM (indicator of volcanic tremor and the intensity of the eruption) from 7.00 (3h UTC) on September 11th and 15:30 (11:30 UTC) on September 16 for the seismic station Faujas, located on the side north of the volcano. (© OVPF / IPGP)

No significant deformation or seismicity were recorded during the day.

The volume of lava emitted from the beginning of the eruption is estimated (by satellite remote sensing) between 2 and 5 million m3.

 

Field observations: The main cone continues to build around a lava fountain of about fifty meters high (around 15:30). A second cone with smaller dimensions is attached upstream of the latter. Only a slight degassing remains observable at this second cone. The main cone is broken on its northern side, and a flow escapes towards the northeast. The front of this flow being located under the cloud layer could not be located.

Source : OVPF

Photo : Kelly Maillot

 

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:
Kilauea Volcano continues to erupt at its summit and from its East Rift Zone. Summit tiltmeters recorded continued deflationary tilt, with little change in the summit lava lake level. The 61g lava flow fed from Pu’u’O’o in the East Rift Zone has been entering the ocean at Kamokuna and there have been breakouts about 2 km (1.2 mi) inland from the coast. The 61g flow poses no threat to nearby communities.

kilauea

Sean King.

Summit Observations:
Summit tiltmeters recorded continued deflationary tilt over the past day, with little change in the summit lava lake level. The lake surface was about 18 m (59 ft) below the floor of Halema’uma’u this morning. Webcam views of the lava lake can be found at the following webpage: http://hvo.wr.usgs.gov/cams/region_kism.php.

Summit seismicity was at typical levels, while volcanic tremor amplitudes continued to fluctuate in association with lava lake spattering. Average daily summit sulfur dioxide emission rates ranged from 3700 to 5600 metric tons/day over the past week. GPS and InSAR data show continued long-term inflation of the summit magma reservoir complex, ongoing since 2010.

 

kilaueaBruce Omori

Pu’u’O’o Observations:
There were no noteworthy geological changes at Pu’u’O’o over the past day, nor were there any significant changes or trends in seismicity or surface deformation. The sulfur dioxide emission rate from all East Rift Zone vents was about 270 metric tons/day when last measured on September 7.

Lava Flow Observations:
The 61g lava flow, extending southeast from Pu’u’O’o on Kilauea’s south flank, continues to supply lava to the ocean near Kamokuna. HVO staff observed a fairly robust ocean entry plume carried to the southwest this morning. Active breakouts were reported this week by University of Hawai’i geologists on the coastal plain about 2 km (~1.2 mi) inland from ocean entry.

Source : HVO

Photos : Sean King , Bruce Omori .

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