Activity from 2/15-2/16:
At the summit, at Halem`uma`u crater there was even more lava spattering and movement in the crater. Inside the crater, the lava level repeatedly rose as fell, changing it height by as much as 10 meters. This movement occurred from 8 AM to 6 PM, then it rose and fell less, then by 3 AM much rising and falling was occurring again. Another DI (deflation-inflation) event started). At 12:20 PM yesterday deflation occurred, and afterwards at 7:00AM today inflation occurred. When more movement of the lava occurred more seismic tremors were recorded at the crater.
At the TEB vent, lava continued to flow out and feed surface lava flows.
Deflation-Inflation or DI events are know to occur at the summit of Kilauea (at Halema`um`u crater) when the crater is expanding or contracting. Click here to read a "Volcano Watch" article from May 2009 about the significance of DI events at Kilaeua. Respond to this post by commenting with something you have learned about DI events at Kilauea.
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15 comments:
I learned that between the time in which the deflation inflation happens magma degases and becomes more dense. I also learned that magma would be flat when the gas is released.
I learned that a volcanoes gas is like convection currents. I also wouldn't have had expected 47 DI's 2008, but it turns out there were.
DI events is short for deflation and inflation. DI events are increasing at Kilaeua. Prior to 2008, there were about 10 events a year. In 2008 there were 47 DI events. DI events work like lava lamps in the way they have convection currents.
DI elemants cause deflation,than inflation. they also have a way to move as convection currents.
I learned that DI elements cause the summit vent to deflate, then after 12 to 48 hours suddenly the vent inflates going back to normal. The deflation could be caused by a dense flow of magma, and the inflation could be caused by new, fresh, magma.
I learned that in the year of 2009 there were only 47 DI events, and so far, Kilaeua has already produced 15. Also, I learned that because of the density rules, the hot magma comes to the top (like a lava lamp).
I learned that last year in 2009 there were 47 DI events, but only 15 so far this year. I also learned that the DI deflation could possibly be caused by the downward flow of dense magma.
Nathan L
I learned that because of density, the magma comes to the top. I also learned that DI elements cause the summit to deflate the 12-48 hours later it inflates back to normal.
Some things that I have learned about DI events is that DI actually stands for "Deflation-Inflation". Also DI events occur when the summit deflates but after around 12-48 hours the volcano goes back to normal by inflation.
I learned a lot about DI events that I had not known before. I learned that after the summit deflates, it will take about 12-48 hours before the summit returns to normal again by inflating. I also learned that 10 is the average number of DI events at any given year. Although, in 2008, there were 47 DI events, and in 2009, there were 15 DI events.
I learned that once magma becomes flat, it becomes more dense. Later on, the heavy and flat magma will sink beneath the surface, and less dense magma will take its place. The new magma is rich in gas. This means that the summit plume is always being changed and renewed.
I learned that alot of the time deflation occurs at the summit and sometimes causes change to the summit, and when lava is flatened it becomes more dense and is then covered by a less dense flow or mound of lava.
I learned that there were 47 DI events in 2008. the reason that magma gets dense is cause it is flat
I learned that what was happening at Kilauea was like a lava lamp. I also learned that there were 15 DI events this year.
DI events may be a physical manifestation of convection within Kilauea’s shallow magma plumbing system.
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