//I added the following metatags
Posted (crates) in nature on April-11-2010


This is Concepcion, a volcano,  forming part of an island (Ometepe)  in the middle of Lake Nicarauga. It was putting forth steam and smoke just as our plane flew over. There was a heavier cloud of material that you can just see on the other side of the volcano which was proceeding down the NW slope towards the small communities just seen on the margin of the island.  This sort of thing must be common, because right at this time the pilot announced that we were beginning our descent into San Jose, Costa Rica without even mentioning that there was an erupting volcano just below us!   The last eruption is said to have occurred last December with gas and ash rising 150 meters into the air.  Maybe the above photo doesn’t depict an eruption?  Hmm…looks like it goes at least 150 meters into the air.  Addendum:  I just found this site which I quote:

On 8 March [just when we were passing over!] an ash and gas plume from Concepción rose to 2,100 metres altitude and light ashfall was reported in nearby communities. Low levels of seismic activity and occasional small explosions producing light ashfall were reported during subsequent days. On 12 March Washington VAAC issued a volcanic ash advisory reporting an eruption producing an ash cloud that reached FL100 (10,000 feet / 3,000 metres altitude). According to news reports there were two further explosions on 14 March. No casualties or damage resulted, although civil defence alerts remained in place for communities around the volcano. The Nicaraguan geological service INETER described the volcano on 19 March as ‘practically in a full eruptive phase’, with 34 explosions between 18:00 on 17 March and 11:45 on 18 March. On 19 March it was reported that the Nicaraguan government was sending army and navy units to the area around Concepción to strengthen civil defence preparations and prepare evacuation routes, ‘just in case’. The location of Concepción, on the island of Ometepe in Lake Nicaragua, makes floods and tsunamis a potential danger if the volcano were to erupt.

However, shortly afterwards activity at the volcano began to decline, with INETER reporting on 22 March that degassing and seismic activity had fallen to low levels in comparison with the preceding days. On 24 March INETER confirmed a ‘considerable reduction in activity’ but reported continuing ‘anomalous’ levels of seismicity. The current situation is that activity remains low, but the volcano continues to be carefully monitored.”

The northern end of Lake Managua in Nicaragua. Note the line of  steaming volcanoes.  Lake Managua is just to the north of Lake Nicaragua.

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