Chaparrastique [San Miquel] Volcano erupts

Volcan Chaparrastique (San Miquel) erupted on Sunday.

SanMiguelVolcano
Click the image to go to the source where there are 17 images

sanmiquellocation(Click the Image for a larger/clearer version)

A new eruption began at the volcano this morning at 10:50 am local time. A strong vulcanian-type explosion produced an ash plume of unknown but considerable (several km) height.
According to local press, ash fall was expected in the town of Chinameca and Civil Protection has begun evacuations of families residing in a radius of 3 km around the volcano.

About 5,000 people live in the area, according to civil protection officials. So far, no one has been reported hurt.

The 7,025-foot volcano is located about 30 miles from the city of San Miguel and about 90 miles east of the capital San Salvador. Its last major eruption occurred in 1976.

Santos Osorio, a member of a local coffee growers union, told Reuters that heavy ash was falling on coffee plantations. El Salvador’s coffee output has already been reduced by an outbreak of leaf rust.

Mm, more expensive coffee then!

sanmiqueldata

The symmetrical cone of San Miguel volcano, one of the most active in El Salvador, rises from near sea level to form one of the country’s most prominent landmarks. The unvegetated summit of the 2130-m-high volcano rises above slopes draped with coffee plantations. A broad, deep crater complex that has been frequently modified by historical eruptions (recorded since the early 16th century) caps the truncated summit of the towering volcano, which is also known locally as Chaparrastique. Radial fissures on the flanks of the basaltic-andesitic volcano have fed a series of historical lava flows, including several erupted during the 17th-19th centuries that reached beyond the base of the volcano on the north, NE, and SE sides. The SE-flank lava flows are the largest and form broad, sparsely vegetated lava fields crossed by highways and a railroad skirting the base of the volcano. The location of flank vents has migrated higher on the edifice during historical time, and the most recent activity has consisted of minor ash eruptions from the summit crater.

Source: Smithsonian

The last activity report from Smithsonian was 2011

23 March-29 March 2011

Servicio Nacional de Estudios Territoriales (SNET) reported that during a survey of the San Miguel crater on 9 and 16 March observers noted pulses of gas rising 200 m from the crater. On 12 March the number and amplitude of earthquakes increased. RSAM values rose the next day to 121 units per day on average, up from normal values around 50 units per day. RSAM values continued to fluctuate during the next few days and reached as high as 319 units on 19 March, 414 units on 20 March, and 234 on 21 March. On 18 and 20 March, local residents felt vibrations and heard minor rumbling. Observations on 25 March indicated that gas plumes rose 100 m from the crater. On 28 March SNET noted that seismicity had gradually decreased during the previous few days, and was as low as 80 RSAM units on 27 March. Access to areas within a 2-km-radius remained restricted.

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Islet on Japanese coast created by volcanic eruption expected to remain for several years

Scientists believe that the islet which rose up from the waters off the coast of Japan due to a volcanic eruption last month may become a permanent fixture, at least for now. The small island, 1,000 kilometers south of Tokyo in the Ogasawara island chain, has been growing since it first appeared and is now three-and-a-half times its original size as of December 4.

When it first appeared last November 24, the Japan Coast Guard said that it was still too early to tell if the island would not eventually disappear once the underwater volcanic eruption is done. But now the Japan Meteorological Agency says it looks like the island will be here for a while and will not disappear in the next few weeks or maybe even years. However they cannot give yet a clear estimate because the volcanic eruption is still ongoing and there is still the possibility that a stronger eruption can blow apart the islet. Agency official Tomoyuki Kano said that they are still seeing wisps of smoke and volcanic ash coming out of the islet and there is even lava coming out every once in a while, so it might still continue to grow.

Read more at the source

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BYU geologists discover ‘super volcano’ in Utah

Geologists at Brigham Young University have discovered what may be the world’s largest “super” volcano that erupted in Utah’s own backyard.

While there are a variety of volcanoes that blast away in different ways, super volcanic eruptions are the biggest that collapse into large calderas. Yellowstone Park is the remains of one of those calderas and it’s still very much alive and active.

But, geologists think they may have found an equally as big if not bigger super volcano, one that shook up western Utah and eastern Nevada 30 million years ago. The eruption is hardly visible to the naked eye now, but underneath and in surrounding formations, the evidence was waiting to be uncovered.

Read more at the source

At ~6000 cubic kilometres it is certainly a big one, but I wonder how many undiscovered large caldera like this there are around the world? Covered now by sea, or eroded so we cannot see, we shall never know however I suspect many in Earth’s more turbulent past.

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Volcano Sends Pillar Of Fire 1,000m Into Sky

Source: Sky News

With a pillar of fire stretching up into the clouds, this spectacular image captures the moment a volcano erupted in remote Russia.

Mordor Volcano(Click the Image for a slightly larger/clearer version)
The dramatic picture of Klyuchevskoy was captured by photographer Marc Szeglat on October 16 at a distance of approximately 9.5 miles from its concealed cone, as the volcano erupted for the first time in three years.

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I love the new GVP site look BUT…..

First off credit where credit is due, the new GVP web site looks very nice in my opinion.

Click this image to go to the GVP site in a new window/tab.
gvpsite01

In particular I love the update to the SI/USGS weekly reports page which is so much better looking now than the original.
Continue reading

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Cascades Seismograms 30 April 2013

All images are sourced from and are ©IRIS using the BUD Explorer.

EDM = Mt St Helens, GPW = Glacier Peak, MBW = Mt Baker, RCM = Mt Rainer, TDH = Mt Hood
Click to see the full post and images

Posted in Cascades Seismograms, Glacier Peak, Mt Baker, Mt Hood, Mt Rainier, Mt St Helens, UW.EDM, UW.GPW, UW.MBW, UW.RCM, UW.TDH | Tagged , , , , , | Leave a comment

Cascades Seismograms 29 April 2013

All images are sourced from and are ©IRIS using the BUD Explorer.

EDM = Mt St Helens, GPW = Glacier Peak, MBW = Mt Baker, RCM = Mt Rainer, TDH = Mt Hood
Click to see the full post and images

Posted in Cascades Seismograms, Glacier Peak, Mt Baker, Mt Hood, Mt Rainier, Mt St Helens, UW.EDM, UW.GPW, UW.MBW, UW.RCM, UW.TDH | Tagged , , , , , | Leave a comment