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Dr Janine Krippner Profile picture
@janinekrippner
Oct 21, 2017 • 6 tweets • 2 min read Twitter logo Read on Twitter
Thread: 21.10.17 #Agung volcano in #Bali remains on Alert level IV esdm.go.id/id/media-cente…
For the status to decrease, comprehensive analysis of all seismic data, deformation, geochemistry, & remote sensing satellite data is needed
The agencies will not rush the decision as the activity has fluctuated since Alert level IV was put in place.
Even though the seismicity has decreased, inflation of the volcano continues, indicating that this is not a good time to lower the alert.
The Alert level will be lowered if seismicity continues to decrease, inflation declines, and observed visual signs (steam?) decrease.
The 9-12 km exclusion radius remains in place.

For the full 21.10.17 report (not in English) go here: esdm.go.id/id/media-cente…

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More from @janinekrippner

Dr Janine Krippner Profile picture
Dec 1, 2017
Thread:
Official report - Recent Developments with #Agung Activities (1 December 2017 21:00 WITA) via @id_magma
(Translated using Google, clarified/edited by me): magma.vsi.esdm.go.id/press/view.php…
1/n * Monitoring Data Analysis *
-Visual-
After undergoing a volcanic earthquake swarm over the period Sept-Oct 2017, finally on 21 November 2017 at 17:05 WITA the phase of eruption of Mount Agung evolved to produce volcanic ash as high as 700 m above the peak.
2/n After the eruption, the next eruption occurred again on November 25, 2017 at 17:20 WITA with an ash plume height of 1500 m above the peak. On 26 and 27 November 2017 eruptions occurred with the ash column height reaching 3000 m above the peak.
Read 24 tweets
Dr Janine Krippner Profile picture
Nov 28, 2017
Thread: @BNPB_Indonesia #Agung update by @Sutopo_BNPB
Magmatic eruption of Agung continues with ash plume heights to 2,500 - 3,000 m above the volcano.
facebook.com/HumasBNPB/post…
Incandescence from lava is visible in the crater at night. Tremor is continuous. Alert level remains at IV, the highest level.
PVMBG continues to record increasing volcanic activity. The potential for a larger eruption is increasing.
However, the intensity and timing cannot be predicted with certainty. Estimating the future character of the eruption of Agung tends to be more difficult than other volcanoes due to the absence of instrumental data from previous eruptions for comparison.
Read 11 tweets
Dr Janine Krippner Profile picture
Nov 27, 2017
Thread: Increased Status of #Agung, Bali From Level Ill (SIAGA) to Level IV (AWAS) by @id_magma magma.vsi.esdm.go.id/press/view.php…
(translated using Google, translations corrected by me)
#Agung experienced inflation before the phreatic eruption of November 21, 2017 and inflation is also still recorded by a tiltmeter installed 4 km from the peak of Agung in the South. This indicates sufficiently strong pressure towards the surface.
Measurements of gas after the phreatic eruption on November 21, 2017 show that magmatic gases like C02 and S02 are consistently observed. This indicates that the pathway for the magma has opened so that gases can come out more easily.
Read 35 tweets

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