A lot of activity yesterday 20th at the Bardarbunga caldera (with over 90.01% quality)
mag less than1= 3 , mag1= 34 , mag2= 7 , mag3= 12 , mag4= 7 , mag5= 1
total= 64 , total energy released= 1,314.3135 TTNT
Which brings me to something I have been trying to get my head around since this started
What is the shape of the caldera? where is the Rim?
I'm seeing two shapes on the web that are similar
the IMO one
which I don't get the numbers along the borders, they are weird, they are not "northing" type numbers although they do look that style
a topographical GE overlay that popped up on volcano cafe, which looks similar, and has a 3D effect to it
then there is the topographical map from OpenCycleMap, which shows something else altogether, basically a flat top cone. I have read the height of
Bardarbunga is 2000 metres, Open Cycle map shows only a few smaller cones inside the caldera at 2000m, the main top is at 1900, then there is a
plateau on the left side ( green outline line marked "a" on my image below is at 1950m, and a the cones also on the left at 2000m (marked "b")
The closest topo match to the first two caldera images above is the 1900m level !!??!
WTH?
anyone have any idea?
larger size of above images available by right clicking and "view image"
unless the OpenCycleMap is just showing Snow/Ice level, not the actual rock level
I want to get the Rim height right, to make another animation based on the first image style
edit on 1000000029329314 by muzzy because: (no reason given)
edit: actually the next line out from the red one at 1800m looks even more like the IMO and volcanocafe ones, it shows the lower curve inwards, like a
rounded Australia south coast shape
If this is the case then Open Cycle Map is showing that there is (was?) 200 metres of snow/ice piled on top of the caldera floor + whatever depth the
caldera is/was as well. Does this stack up (pun) to information regarding the ice cap on top?
edit on 1000000029329314 by muzzy because: (no
reason given)
if it is the next line out from the red one (1900m) that would just about match image 3 (3D) in regards the M5's mostly being inside the Rim
edit on 1000000029329314 by muzzy because: (no reason given)