Propels ash more than 4 miles (7 km) into the sky and blows away much of the mountain’s summit. Includes video.
Indonesia’s Center for Volcanology and Geological Hazard Mitigation (PVMBG) says the explosion “completely annihilated” the mountain’s peak, it’s ‘lava dome.’
Images released by PVMBG show what the top of the volcano, with more than a million cubic meters shaved off, looks like. Text on top of frame reads “Before Feb. 19, 2018” and text on bottom reads “After Feb. 19, 2018.
Picktures, videos, and links in the original so “hit the link”…
Thanks to Jerry Duff and Keith Connelly for these links
“This is a major eruption,” says Jerry. “Much of Asia and Malaysia will be affected. Crop loss and possibly no summer. The ash is above both the stratosphere and troposphere. I cannot stress how serious this eruption is.”
Now to me it just looks like one mountain peak. Not seeing how this is going to wipe out Asian crops or end Summer. Then again, I’ve no idea how big Sinabung is, nor how that stacks up to others. Given that, let’s look at an eruption I remember.
During the nine hours of vigorous eruptive activity, about 540,000,000 tons of ash fell over an area of more than 22,000 square miles (57,000 km2). The total volume of the ash before its compaction by rainfall was about 0.3 cubic miles (1.3 km3). The volume of the uncompacted ash is equivalent to about 0.05 cubic miles (210,000,000 m3) of solid rock, or about 7% of the amount of material that slid off in the debris avalanche. By around 5:30 p.m. on May 18, the vertical ash column declined in stature, but less severe outbursts continued through the next several days.
So 540 Mega-tons of ash, about 1/3 cubic mile. 57,000 km^2
Or about 5/100 cubic miles of rock.
Compare Sinabung using numbers in the quote. 1,000,000 km^2 of rock gone.
Somehow I’m not seeing how that is earth shaking. Maybe the numbers are wrong?
An epic gigantic eruption took place on 19 February 2018 with large volumes of ash and debris shot upwards to thousands of feet into the sky. The country’s National Disaster Mitigation Agency has confirmed that there were currently no fatalities or injuries. The eruption expelled at least 1.6 million cubic meters of material from the mountain’s summit.
So they say 1.6 mega-m^3 of rock. OK, it’s a big eruption, but if I’ve got the numbers right, much less than Mt. St. Helens. So am I missing something here?