July 29 , 2017. EN. Piton de la Fournaise , Cleveland , Poas , Turrialba , Kilauea .

Home / Alaska / July 29 , 2017. EN. Piton de la Fournaise , Cleveland , Poas , Turrialba , Kilauea .

July 29 , 2017. EN. Piton de la Fournaise , Cleveland , Poas , Turrialba , Kilauea .

July 29 , 2017.

 

Piton de la Fournaise , La Réunion :

Activity bulletin of Friday, July 28, 2017 at 4:30 pm (local time).

The eruption begun on July 14 at 00:50 local time continues. The intensity of the volcanic tremor (indicator of surface eruptive intensity) has increased quite significantly in the last 24 hours. This increase is partly related to the poor weather conditions that cause seismic signals (Figure 1).

 

Figure 1: Evolution of the RSAM (volcanic tremor and eruption intensity indicator) between 00:00 (20h UTC) on July 14th and 15h30 (11h30 UTC) on 28th July on the RVL seismic station, located on the flank South of the volcano. (© OVPF / IPGP)

– No earthquakes have been recorded in the past 24 hours.
– The slight inflation of the summit area is continuing.

Due to bad weather conditions, no reconnaissance on the ground could be made today.

 

L’image contient peut-être : montagne, feu, plein air et nature

Estimates carried out using satellite methods via the HOTVOLC platform (OPGC – Clermont Ferrand) have become rare in recent days because of the strong cloud cover present on the Piton de la Fournaise massif. The few estimates show a minimum flow of about 2 m3 / s.

Source : OVPF

Photo : Christian Holveck

 

Cleveland , Alaska :

52°49’20 » N 169°56’42 » W,
Summit Elevation 5676 ft (1730 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Elevated surface temperatures were observed on three days over the past week. Satellite observations show that the lava dome in the summit crater has grown during the week from about 30 m to 42 m in diameter, with a slight inflation of its approximate height of 10 m. No activity has been observed in seismic, infrasound, or web-camera data over the past week.

 

 

AVO Image

Summit of Mt. Cleveland volcano – dome visible in crater.

Cleveland volcano is monitored with a limited real-time seismic network, which inhibits AVO’s ability to detect precursory unrest that may lead to an explosive eruption. Rapid detection of an ash-producing eruption may be possible using a combination of seismic, infrasound, lightning, and satellite data.

 

Source : AVO

Photo : Werner, Cindy . (2016)

 

Poas , Turrialba , Costa Rica :

Activity report of the Poas and Turrialba Volcanoes, 28 July 2017, Update of 11h00.

Poas Volcano: Volcanic activity in the last 24 hours.

During the last 24 hours, seismic signals  tremor type ,  continuous , of low amplitude have been observed. There have been a number of LP type seismic events with low amplitude, but these are sporadic. These signals may be associated with continuous degassing with a column of water vapor, gases and magmatic aerosols. But right now the camera is covered by clouds and / or emissions and visibility is low.

 

L’image contient peut-être : montagne, ciel, nuage, nature et plein air

There were no reports of ash falls. This morning, a smell of sulfur has been reported in Grecia since 05:00 (local time).
At the time of this report, the winds at the top of the volcano are variable, but are mainly directed to the west and southwest. Today, the wind is strong, with speeds up to 55.5km / h.

Volcan Turrialba: Volcanic activity in the last 24 hours.

During the last 24 hours, varying tremors of low amplitude were observed. There have been a number of LP type seismic events with low amplitude. The camera showed a variable degassing , with a column of water vapor, gases and magmatic aerosols, rising to a height of 200-500 meters from the bottom of the active crater.

 

L’image contient peut-être : 1 personne, nuage, montagne, ciel, plein air et nature

At the time of this report, the winds at the top of the volcano are variable, but are mainly directed to the west. Today, the wind is strong, with speeds of up to 50 km / h.

Source : Ovsicori

 

Kilauea , Hawaï :

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 its summit and from the Puʻu ʻŌʻō vent on its East Rift Zone. The episode 61g lava flow from Puʻu ʻŌʻō continues to enter the ocean at Kamokuna. Surface flows are active above the pali, with continued activity on the coastal plain. These flows pose no threat to nearby communities. There have been no significant changes in seismicity across the volcano, but summit tiltmeters have recorded a sharp deflationary trend since yesterday afternoon. At the summit, the lake level is roughly 42 m (138 ft) below the Overlook crater rim this morning.

 

Summit Observations:
Summit tiltmeters recorded a sharp deflationary trend since yesterday afternoon. The level of the lava lake is roughly 42 m (138 ft) below the Overlook crater rim this morning, a drop of about 12 m (40 ft) in the past day. Webcam views of the lava lake can be found at this webpage: https://volcanoes.usgs.gov/volcanoes/kilauea/multimedia_webcams.html. Summit tremor continues to fluctuate in response to variations in lava lake spattering, and earthquakes occurred at normal, background rates. Summit sulfur dioxide emission rates remain high.

Puʻu ʻŌʻō Observations:
Webcam images continue to show persistent glow from long-term sources at Puʻu ʻŌʻō. Seismic activity is at background levels, and ground tilt measurements continued to record a deflationary trend during the past day. 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.

L’image contient peut-être : montagne, océan, eau, ciel, nuage, plein air et nature

Lava Flow Observations:
The episode 61g flow is still active and entering the ocean at Kamokuna. Several large cracks have developed in the lava delta, running parallel to the coastline and spanning the width of the delta. These cracks increase the likelihood of a large delta collapse.
Surface flows continue on the upper portion of the flow field above the pali. Webcam views indicate that minor breakouts continue on the coastal plain and are still roughly 2 km (1.2 mi) upslope from the gravel emergency route.

Source : HVO

Photos : David Ford , HVO , Bruce Omori.

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