Brief bit of volcano information from Costa Rica this week: In excess of the final week, Rincón de la Vieja has had a couple of tiny explosions that rained ash in the spot in close proximity to the volcano. This is the volcano’s initially bout of activity since a short time period of noise in the course of September 2014. Neither explosion was notably substantial, with a tiny ash plume that was a lot less than a kilometer over the volcano. Volcanologists from OVSICORI, the volcano checking agency of Costa Rica, visited Rincón de la Vieja to get a better deal with on the the latest unrest. What they identified was a amount of tiny ash deposits connected to other steam-pushed explosions that have happened since the get started of 2016 (most likely tiny adequate to go unnoticed, primarily if obscured by clouds). The most exciting thing they identified was that ash from these explosions, while largely chunks of pre-existing rocks and bits of sulfur, did contain a tiny ingredient of what seems to be refreshing lava (see under) in the variety of tiny shards of volcanic glass (obsidian). This implies that there could be magma lurking not much too far beneath the summit crater lake spot of Rincón de la Vieja. Having said that, these explosions are dominantly steam-pushed (phreatic) explosions, while the volcano bears watching if the explosions continue on and/or raise in size and frequency.
Ash from the latest explosions at Rincón de la Vieja in Costa Rica. Box A is the over-all search of the ash. B and C are glass fragments possibly from new magma involved in the eruptions whilst D is a bleb of sulfur. OVSICORI
The summit crater lake is also emitting extra magmatic gasses like hydrogen sulfide and sulfur dioxide compared to the latest several years and is hotter as effectively (forty five-55ºC). Significantly like the shards of glass in the ash, these modifications in the lake suggests to OVSICORI that there may well be magma transferring nearer to the surface. What is most significant is OVSICORI’s problem that these modifications at Rincón de la Vieja may well suggest the volcano is entering a extra risky time period where by the prospective for bigger explosions and lahars (volcanic mudflows) is growing. This indicates that persons residing in close proximity to the volcano have to have to perform near attention to how the volcano is behaving. The final substantial eruption from Rincón de la Vieja was a VEI three eruption in 1966, while it has made a lot of scaled-down explosions in the half century since that eruption. In Costa Rica, Poás, and Turrialba have been a great deal extra active over the final two several years. The most well-known Costa Rican volcano, Arenal, has been stunning quiet since 2010 soon after 32 several years of in close proximity to-frequent eruption. Go Again to Best. Skip To: Begin of Post.
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Brief bit of volcano information from Costa Rica this week:
In excess of the final week, Rincón de la Vieja has had a couple of tiny explosions that rained ash in the spot in close proximity to the volcano. This is the volcano’s initially bout of activity since a short time period of noise in the course of September 2014. Neither explosion was notably substantial, with a tiny ash plume that was a lot less than a kilometer over the volcano.
Volcanologists from OVSICORI, the volcano checking agency of Costa Rica, visited Rincón de la Vieja to get a better deal with on the the latest unrest. What they identified was a amount of tiny ash deposits connected to other steam-pushed explosions that have happened since the get started of 2016 (most likely tiny adequate to go unnoticed, primarily if obscured by clouds).
The most exciting thing they identified was that ash from these explosions, while largely chunks of pre-existing rocks and bits of sulfur, did contain a tiny ingredient of what seems to be refreshing lava (see under) in the variety of tiny shards of volcanic glass (obsidian). This implies that there could be magma lurking not much too far beneath the summit crater lake spot of Rincón de la Vieja. Having said that, these explosions are dominantly steam-pushed (phreatic) explosions, while the volcano bears watching if the explosions continue on and/or raise in size and frequency.
The summit crater lake is also emitting extra magmatic gasses like hydrogen sulfide and sulfur dioxide compared to the latest several years and is hotter as effectively (forty five-55ºC). Significantly like the shards of glass in the ash, these modifications in the lake suggests to OVSICORI that there may well be magma transferring nearer to the surface.
What is most significant is OVSICORI’s problem that these modifications at Rincón de la Vieja may well suggest the volcano is entering a extra risky time period where by the prospective for bigger explosions and lahars (volcanic mudflows) is growing. This indicates that persons residing in close proximity to the volcano have to have to perform near attention to how the volcano is behaving.
The final substantial eruption from Rincón de la Vieja was a VEI three eruption in 1966, while it has made a lot of scaled-down explosions in the half century since that eruption. In Costa Rica, Poás, and Turrialba have been a great deal extra active over the final two several years. The most well-known Costa Rican volcano, Arenal, has been stunning quiet since 2010 soon after 32 several years of in close proximity to-frequent eruption.
Go Again to Best. Skip To: Begin of Post.