Volcanic (Hunga Tonga-Hunga Ha'apai) eruption in Tonga, near Nuku'alofa

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Discussion Overview

The thread discusses the volcanic activity of the Hunga Tonga-Hunga Ha'apai volcano near Nuku'alofa, Tonga, particularly focusing on recent eruptions and their historical context. Participants explore the implications of these eruptions, their visibility, and the geological changes associated with them.

Discussion Character

  • Exploratory, Historical, Technical explanation

Main Points Raised

  • Some participants note that the Hunga Tonga volcano previously erupted in 2009, creating an island, and suggest that its activity is increasing.
  • One participant mentions the use of historical imagery in Google Earth to analyze the geological event.
  • Another participant expresses surprise that volcanic eruptions could occur without being widely reported for over a week, referencing a local fisherman's report of the eruption.
  • Some participants discuss the visibility of the eruption, with one suggesting that the changes observed may not be as dramatic as expected, comparing it to other geological events like floods and landslides.

Areas of Agreement / Disagreement

Participants express varying levels of surprise regarding the reporting of volcanic activity and the visibility of geological changes. There is no consensus on the significance of the eruption or its impact.

Contextual Notes

Some statements rely on local observations and reports, which may not capture the full scope of the volcanic activity. The discussion reflects differing interpretations of the eruption's visibility and significance.

Astronuc
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The same volcano which erupted out of the Pacific Ocean, 63 kilometres north of Nuku'alofa in 2009, creating an island. We somehow missed this in 2009.
http://en.wikipedia.org/wiki/Hunga_Tonga
http://en.wikipedia.org/wiki/2009_Tonga_undersea_volcanic_eruption
17px-WMA_button2b.png
20°34′S 175°23′W / 20.57°S 175.38°Whttp://www.stuff.co.nz/world/south-pacific/64548453/Big-volcanic-eruption-near-Tongas-capital
http://matangitonga.to/2014/12/30/hunga-haapai-eruption-continues

http://volcano.si.edu/volcano.cfm?vn=243040

It looks like that island, or volcano, is getting bigger.

http://www.vulkaner.no/v/volcan/submarin/hunga.html
Cool video of 2009 eruption.
 
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Time to crank up "historical imagery" in Google Earth.
 
Known as the Hunga Ha'apai volcano, Matangi Tonga says it may have been erupting for more than a week.
I didn't know volcano eruptions could happen without anyone noting it for a week.
 
mfb said:
I didn't know volcano eruptions could happen without anyone noting it for a week.

It was noted by locals , obviously just not widely publicised

Known as the Hunga Ha'apai volcano, Matangi Tonga says it may have been erupting for more than a week.
The eruption was first reported by a fisherman who came back from the area on December 19, according to the Deputy Secretary of Lands and Natural Resources, Taniela Kula.

my bold
 
Looked it over with Google Earth just for a "big picture" context of a major geological event; floods and landslides make obvious major changes when comparing photos from different dates, so this should be dramatic, right? Got a couple photos of "steam" from fissures drifting downwind that look like a smoldering dump fire, no dramatic change of reef structures. This is a little bitty event.
 

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