A couple of updates on volcanic eruptions at the beginning of 2017:
The greatest volcanic news from the recently continues to be the surprising and energetic eruptions at Bogoslof within the Aleutians of Alaska. After creating a large explosive eruption on December 16, the volcano has adopted up with the addition of more explosions every single day approximately, a few of which arrived at five to ten kilometers (15,000-35,000 ft) within the small island. Just yesterday (The month of january 4), the volcano produced another explosion that arrived at 10 kilometers (33,000 ft). The highly explosive nature of those eruptions is probably rooted within the interaction between your new magma reaching the top and also the abundant seawater it meets if this erupts. That water can rapidly flash to steam which help fragment the magma into ash, contributing to the explosivity from the eruption.
The Alaska Volcano Observatory has released apreliminary map (see below) that demonstrate the alterations towards the island, where these explosive eruptions have destroyed area of the formerly existing island and added more land, mainly by means of volcanic debris from all of these blasts. AVO presently has Bogoslof on a Red/Warning alert status due to the unpredictable nature of those towering explosive shots, a few of which happen to be obscured by clouds. Rather, proof of eruptions from Bogoslof continues to be selected up either by seismometers on distant volcanoes (like Alaska’s Okmok) or via infrasound that detects low frequency sounds from explosion over very lengthy distances (100s to 10,000s of kilometers).
Update 1/4/2017 6:30 PM EST: Appears like Bogoslof had another explosive eruption today. Read this Himawari-8 loop showing the truly amazing shot up to the plume and also the lateral distributing, developing a plinian column that appears as an umbrella.
Dan Lindsey (@DanLindsey77) January 5, 2017
Meanwhile, at Kilauea around the big island of hawaii of Hawai’i, the present action relates to part of the volcano collapsing into the sea. A part of a lava bench/delta (see top) built by lava flows reaching the Gulf Of Mexico collapsed. These benches are highly unstable, and that’s why the NPS and USGS try to convince tourists to stay away from sea records lest you end up part of the collapse into lava and boiling hot steam/water encircled by acidic vapors (sounds enjoyable).
This collapse does mean the lava reaching the sea is intensely flowing in to the ocean, resulting in some impressive steam and ash plumes originating from that water-lava interaction (similar to a small-Bogoslof). The NPS published a video of the lava from the exposed lava tube shooting into the ocean to begin from the bench collapse. The steam plume originates from lava at 1200C hitting sea water at ~15C—quite a thermal shock leading towards the small explosions you can observe within the video.
In Iceland, Katla had a small earthquake swarm that created a M3.5 temblor. This isn’t unusual for that Icelandic volcano and sure asimilar (but much smaller) version of the swarm from earlier in 2016(which didn’t result in any eruption). Indeed, and don’t believe all individuals news articles claiming the new study in Earth and Planetary Science Lettersis “predicting” more eruptions soon from Iceland such as the Eyjafjallajokull in 2010. Rather, that research examined the record of activity and found that they are more common than we may have formerly thought (every 44 rather of 56 years, typically). It doesn’t change just one factor concerning the condition of volcanoesin Iceland—we just learn more now about how exactly common individuals eruptions might be typically.