11/04/2015. Ubinas, Kilauea.

11/04/2015. Ubinas, Kilauea.

Ubinas, Perou :


A) Between January 8 and April 10, 2015, the seismicity of the volcano Ubinas presented a variable behavior. Until the second week of February, seismicity remained generally low. But as of March 22, it was noticed a marked increase in LP-type earthquakes and the appearance on the rise of earthquake hybrid type , the latter being directly associated with the ascent of magma. Finally, on April 8 at 3:32 local time, after 4 and a half months of calm in the explosive activity the volcano Ubinas resubmitted explosion.


The explosion was not particularly large (01 MJ of energy, 30 second duration), but it ‘was enough to reopen the main conduit, after issuing the magmatic material as ash continuously for more than 41 hours . Seismic instruments recorded these shows as “seismic tremor”. Around 20 pm (local time) on April 9, we began to observe a decrease in seismic activity, which, in the present, shows limited increment.


B) The flow of SO2 of Ubinas volcano, which in recent months remained around 500 TN / day experienced a gradual increase since early March, with a peak of 8 April 3724 TN / day.

C) In this monitoring period, there ‘s had no thermal anomalies reported or deformation of Ubinas volcano.


D) field observations made between 08 and April 9, 2015 show: strong sulfur smell, a deafening noise, falling of pyroclastic fragments between 20 and 40 cm in diameter at a distance of 200 m north of the crater, ash falls accumulated in large areas around the crater, showing thicknesses greater than 5 cm inside the crater, 3 cm on the edges, 1 cm at an altitude of 4800 m. Finally, the winds have scattered the ashes at distances of 6 km (village Ubinas) where deposits of up to 1 mm were observed, even ash particles were observed in the city of Anascapa (10 miles SE) .

For the next few days eruptive activity will continue but probably gradually decreasing in importance. However, it can not be excluded crises that may be accompanied by moderate explosions. On the other hand, given that rainfall persist today, on the large volume of ash from the volcano, it must be taken into account the possibility of the occurrence of lahars (mudflows) in the Ubinas Valley .

Keep the yellow alert level on the Ubinas volcano.
• Improving preparedness actions and response to a likely increase in the eruptive activity of Ubinas. • Continually assess the impact of health ashfall people, water supply, agricultural and livestock activities, and implement effective mitigation measures. Also, think about the lahars by flows from the volcano. Keep evacuation shelters implemented in 2006. In addition assess the implementation of new shelters, but in areas of low volcanic risk and more than 10 km of the volcano.

Source : OVS /IGP
Photo : Go2perou , Thierry Dockx

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:

Three areas of breakouts in the upslope portion of the June 27th flow field in the East Rift Zone of Kilauea volcano continued to be active. All breakouts are within 7 km (4 mi) of Pu‘u ‘O‘o. Kilauea volcano continued to host an active lava lake at its summit.


Activity continues to be confined to within 4-5 miles of Pu‘u ‘O‘o vent, as molten lava was observed on the flow field and entering adjacent forested areas..

June 27th Lava Flow Observations:
On an overflight yesterday, HVO geologists observed activity at all three breakout sites near Pu‘u ‘O‘o: the Feb. 21 breakout on the northern flank of Pu‘u ‘O‘o, the March 09 breakout originating near Pu’u Kahauale’a, and a forked breakout 5-6 km (3-4 mi) northeast of Pu‘u ‘O‘o. Webcam views confirmed continued activity overnight.

Pu‘u ‘O‘o Observations:
The tiltmeter on the north flank of Pu‘u ‘O‘o recorded minor variations, with intermittent instrumental noise evident in recent data. The sulfur dioxide emission rate from all East Rift Zone vents was about 430 tonnes/day when last measured on March 30.


There are several incandescent and outgassing hornitos on the floor of Pu‘u ‘O‘o’s crater, including the one shown here, which is at the northeast edge of the crater. Recent flows from the hornito appear black.

Summit Observations:
Tiltmeters at Kilauea’s summit did not record any significant tilt during the past several days. Seismic tremor continued at the summit with episodic bursts accompanying spattering and temporary drops in lava level. Earthquake activity remained slightly elevated in the Southwest Rift Zone midway between the summit caldera and the ocean. Sulfur dioxide emission rates averaged 5200 – 7800 tonnes/day for the week ending April 7.

Source : HVO
Photos : HVO, Bruce Omori

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