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Archived Volcano News - John Seach
July 2011
Reports are posted in Eastern Australian Time (UT +10 hr).
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Thursday 28th July 2011
El Hierro Volcano, Canary Islands
An earthquake swarm occurred at El Hierro volcano in July 2011 with 720 earthquakes measured in a week. The earthquakes were measured between magnitude 1-3, and most were at a depth of 5-15 km. The swarm occurred at El Golfo in the northwest of the island at the location of a landslide that created a 100 metre high tsunami about 50,000 years ago. The last eruption at El Hierro volcano occurred in 1793. The island contains 500 volcanic cones.
More on El Hierro volcano...
Volcanoes of Canary Islands...
Monday 18th July 2011
Lokon Volcano, Indonesia
Lokon volcano in Sulawesi, Indonesia erupted yesterday sending ash to a height of 3500 m. Ash emissions were visible from Manado. Increasing activity at the volcano forced 5000 people to evacuate. Yesterdays eruption was the largest since the volcano was placed on the highest alert level last week.
More on Lokon volcano...
Volcanoes of Indonesia...
Friday 15th July 2011
Loki-Fögrufjöll Volcano, Iceland
An eruption has occurred at another volcano in Iceland. A glacial outburst resulted from a subglacial eruption of Loki-Fögrufjöll Volcano on Tuesday night 12th July 2011. The glacial burst occurred from Köldukvíslarjökull, a part of Vatnajökull in southeast Iceland, in a location which was not previously known to have a geothermal area. The flood flowed down the Svedja river into Hágöngulón lagoon and lake Thórisvatn. A flood has never been recorded at this part of the glacier before, although the volcano possibly had subglacial eruptions in 1986 and 1991 from different locations. The water level of Hágöngulón rose 70 centimeters during the flood.
More on Loki-Fögrufjöll volcano...
Volcanoes of Iceland...
Monday 11th July 2011
Lokon Volcano, Indonesia
Lokon volcano in Sulawesi, Indonesia has been placed on the highest alert level on the 10th July due to increasing activity. Tremor has been recorded at the volcano along with 20 small eruptions. Ash emissions reached a height of 500 m above the crater. A 3.5 km exclusion zone has been placed around the volcano.
More on Lokon volcano...
Volcanoes of Indonesia...
Sunday 10th July 2011
Katla Volcano, Iceland
Activity has decreased significantly under Mýrdalsjökull glacier in Iceland after the glacial burst which destroyed a bridge and part of highway number 1. Seismic activity has returned to normal levels. The flood in Múlakvísl has decreased, and the water level in the river has returned to normal. The Civil Protection Department has lowered the alert level from danger to uncertainty. The road is closed between Höfðabrekka, east of Vík village, and river Skálm, near Álftaver, and the river will be impassable for at least 2-3 weeks. Currently the only road past the area is the highland road Fjallabaksleid nyrdri, which is only passable for 4x4 vehicles. Evacuation order for Álftaver and Meðalland areas has been cancelled and people have returned home. Mýrdalsjökull glacier is still considered dangerous and is closed to the public. The glacial outburst was possibly caused by a small subglacial eruption of Katla volcano. Scientists flew over the eruption site yesterday and observed two 50 m deep depressions at the site where the glacial burst occurred. The walls of the depression shows layers of ash from the eruption of Eyjafjallajökull last year, and the recent Grímsvötn eruption. The depressions contain vertical walls which indicate that the glacial melt occurred very quickly. It was caused either by a magma or a steam explosion. There are deep and wide cracks around the depressions.
More on Katla volcano...
Volcanoes of Iceland...
Sunday 10th July 2011
Mt Etna Volcano, Italy
A paroxysmal eruption occurred at SE crater of Mt Etna volcano on 9th July 2011 after a few days of strobolian activity. This is the fifth eruption at Mt Etna in 2011. The eruption was shorter than previous eruptions this year. Weak strombolian activity occurred at SE crater between 4-7 July. Activity stopped on 8th July and resumed on 9th July around midday when lava overflowed the eastern rim of SE crater. At 13:45 UT strombolian eruptions intensified to produce a lava fountain. Ash emissions reached a height of several kilometres and produced lapilli falls in populated areas between Nicolosi and Catania in the south, and Trecastagni, Viagrande and Acireale in the southeast. The paroxysm lasted for one hour and was accompanied by a lava flow which reached the Valle del Bove. During the start of the paroxysm there was an ash explosion from Bocca Nuova.
More on Mt Etna volcano...
Volcanoes of Italy...
Saturday 9th July 2011
Katla Volcano, Iceland
An eruption has possibly started at Katla volcano, Iceland.
A glacial flood from under the Mýrdalsjökull icecap has damaged Highway number 1 by the river Múlakvísl. The bridge across Múlakvísl has been destroyed and the road is closed between Höfdabrekka, east of Vík, and Skálm River, near Álftaver. The Múlakvísl flood came from underneath the glacial tongue Höfdabrekkujökull. The glacial ice is cracked at the location where the flood emerged. So far the eruption is not large, but people have been advised to avoid the area. The Álftaver area is being evacuated and preparations are being made for evacuation of the camping area in Thakgil. There is a possibility that the flood was caused by release of meltwater, and not by volcanic activity. Further infomation will be posted when available. There has been speculation about an eruption in Hekla, another volcano in south Iceland over the past few days.
More on Katla volcano...
Volcanoes of Iceland...
Wednesday 6th July 2011
Hekla Volcano, Iceland
Hekla volcano in Iceland is showning signs of unrest. Signs of possible magma movement under the volcano has been detected for the past few days. Since 1970, Hekla volcano has erupted about every 10 years. The initial phase of each Hekla eruption is always highly explosive. The duration and magnitude of the
explosive phase is directly correlated with the length of the preceding repose period. Hekla is the most active volcano in Iceland, and one of the world's best known volcanoes.
More on Hekla volcano...
Volcanoes of Iceland...
Monday 4th July 2011
Soputan Volcano, Indonesia
An explosive eruption began at Soputan volcano on 3rd July 2011. The eruption send an ash plume 6000 m high. The airport at Manado was closed for three hours following the eruption.
More on Soputan volcano...
Volcanoes of Indonesia...