Hasn't anyone considered that blue haze can be a volcanic/earthquake precursor? Perhaps people should be getting prepared instead of wasting time
with looking for other reasons?
Please see the following links with extracts below.
(I hope I've done this the right way)
Dougherty, H.E., 1926, Volcano conditions hint '68 quake: Honolulu Advertiser, 04/14, p. 1.
[subheads: Finch sees similarity to those preceding fatal sixty-foot tidal wave; Blue fumes rise from Halemaumau
and watch is
kept for outburst believed to be imminent; Alika flow crater reported smoking]
Volcano House, Hawaii, April 13.--One hundred and fifty earthquakes, 12 of them noticeable and 6 of them severe, were recorded today on the Kilauea
Roy [sic-Ruy] Finch, assistant volcanologist, says present conditions are similar in many respects to those of 1868 when a great earthquake rocked
Hawaii and a 60-foot tidal wave wrecked villages on the Kona coast preceding a second outbreak of Mauna Loa.
Kilauea is under constant observance. Blue fume smoke was today ascending from the crater floor.
Finch interprets this sign as
forecasting early activity at Halemaumau.
The rest of the article mainly talks of the weather, noting that smoke was possibly seen from the Alika cone [source of 1919 eruption on Mauna Loa's
southwest rift zone].
Report for the period 5 p.m. 17 June to 5 p.m. 18 June 1998
Volcanic activity has remained at a low level. The seismic network recorded 2 rockfall signals and 12 volcano-tectonic earthquakes today.
Samples were taken from the spring near the base of Chances Peak today. The water remains non-acidic and is luke warm.
Today, dust levels were low at all instrumented sites. A blue haze of sulphur dioxide was observed over Chances Peak.
Residents are reminded that the volcano remains in a potentially active state and that the loose deposits are readily mobilised by heavy rain.
Residents should continue listening to Radio Montserrat in case there are sudden changes.
17:00 18 June 1998
Report for the period 5 p.m. 20 June to 5 p.m. 21 June 1998
The volcano has remained quiet today. 3 volcano-tectonic earthquakes were recorded between 4 o’clock yesterday and 4 o’clock today.
Scientists at Lover’s Lane this morning observed that recent heavy rains have cut a channel 6 meters deep through the pyroclastic flow deposits at
the end of the lane. This channel runs someway north of where Fort Ghaut used to be and has damaged the road which used to go into town from the
southeast end of Lovers lane.
Dust levels were low at all sites today. A dense blue sulphur dioxide haze was seen over Chances Peak
after this afternoons
Residents are reminded that the volcano remains in a potentially active state, and that they should continue listening to Radio Montserrat in case
there are sudden changes.
17:00 21 June 1998
Day 24: Monday, July 30 - Angie Roach and John Eichelberger reached the summit caldera of Makushin Volcano…….
There is a strong sulfur smell, accompanied by the unpleasant effects of running eyes and nose and coughing. A blue haze pesists across
the caldera, beyond the steam plume.
Our pilot reports that it is visible as far as 10 km from the vent. We measured no temperatures above the
boiling point, but the most vigorous fumaroles were so energetic that approaching them was out of the question.