We send the data to the Alaska Volcano Observatory, Ed Hawkins (a colleague of Philip's who is studying the effect of volcanism on weather), and the Smithsonian Global Volcanism Program.
We also have a researcher, brahe, interested in reports of earthquakes in the logs.
Please include a link to the logbook page and the name of the ship, date, and latitude and longitude (or other position information) when possible.
Thanks everyone!
Link to archive of this discussion from the old forum
Volcanic and seismic activity
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pommystuart
- Posts: 1795
- Joined: Mon May 18, 2020 12:48 am
- Location: Cooranbong, NSW, Australia.
Re: Volcanic and seismic activity
Manning 9th Oct 1900
Location, Kodiak Harbor, Kodiak ID, Alaska.
https://catalog.archives.gov/OpaAPI/med ... 0_0777.JPG
At 0220 a very heavy shock of earthquake occured, lasting several seconds, probably 90 to 100 seconds.
0422 Another less severe one lasting a few seconds.
Shocks were felt at frequent intervals on shore during the watch; church bells ringing and buildings shaking.
No serious damage done owing to the fact that all buildings are made of wood.
__________________
Reading that may be of interest.
Wikipedia
Ranked No1 in 1900, Mag 7.9, United States, Kodiak Island, Alaska, MMI VIII (Severe) October 9.
http://www.usarray.org/files/docs/pubs/ ... koniag.pdf
https://earthquake.usgs.gov/earthquakes ... egion-info
Location, Kodiak Harbor, Kodiak ID, Alaska.
https://catalog.archives.gov/OpaAPI/med ... 0_0777.JPG
At 0220 a very heavy shock of earthquake occured, lasting several seconds, probably 90 to 100 seconds.
0422 Another less severe one lasting a few seconds.
Shocks were felt at frequent intervals on shore during the watch; church bells ringing and buildings shaking.
No serious damage done owing to the fact that all buildings are made of wood.
__________________
Reading that may be of interest.
Wikipedia
Ranked No1 in 1900, Mag 7.9, United States, Kodiak Island, Alaska, MMI VIII (Severe) October 9.
http://www.usarray.org/files/docs/pubs/ ... koniag.pdf
https://earthquake.usgs.gov/earthquakes ... egion-info
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pommystuart
- Posts: 1795
- Joined: Mon May 18, 2020 12:48 am
- Location: Cooranbong, NSW, Australia.
Re: Volcanic and seismic activity
Manning 19th Sept 1910.
1345 - 1415 passing through volcanic dust bank; quantities of dust settling on deck. Dense black cloud bank in direction of Bogoslof.
1450 - 1600 Sighted Bogoslof in eruption, heavy clouds of steam and smoke issuing therefrom.
1400 In midst of dust bank, vessel in Lat 54 33N, Lo 167 13W, Bogoslof brg SxW1/2W 41mi.
https://catalog.archives.gov/OpaAPI/med ... 0_0306.JPG
also
https://volcano.si.edu/volcano.cfm?vn=311300
The USRC Tahoma got there before the Manning as described on Page 24 (34/54)
https://pubs.usgs.gov/sir/2018/5085/sir20185085.pdf
1345 - 1415 passing through volcanic dust bank; quantities of dust settling on deck. Dense black cloud bank in direction of Bogoslof.
1450 - 1600 Sighted Bogoslof in eruption, heavy clouds of steam and smoke issuing therefrom.
1400 In midst of dust bank, vessel in Lat 54 33N, Lo 167 13W, Bogoslof brg SxW1/2W 41mi.
https://catalog.archives.gov/OpaAPI/med ... 0_0306.JPG
also
https://volcano.si.edu/volcano.cfm?vn=311300
The USRC Tahoma got there before the Manning as described on Page 24 (34/54)
https://pubs.usgs.gov/sir/2018/5085/sir20185085.pdf
Re: Volcanic and seismic activity
Manning June 1, 1914. This entry while coaling at Kodiak, Alaska may be evidence of recent nearby volcanic activity.
https://catalog.archives.gov/OpaAPI/med ... 4_0199.JPGCoaling necessarily slow on account of the necessity of sifting volcanic ash from coal.
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pommystuart
- Posts: 1795
- Joined: Mon May 18, 2020 12:48 am
- Location: Cooranbong, NSW, Australia.
Re: Volcanic and seismic activity
https://catalog.archives.gov/OpaAPI/med ... 2_0172.JPG
Moored at Kodiak, Alaska. 6th June 1912.
1700hrs
Shortly after 5 o'clock (1700hrs) a high yellowish cloud came up from the West and SW within three-quarters of an hour the sky was completely overcast.
Chain lightning was observed, and at 6pm volcanic dust began to fall slowly, greyish white in color.
It grew gradually darker and at 6:30 was almost pitch dark although 2 1/2 hours before sunset.
Thunder became quite frequent, but most of the electrical discharges were not visible owing to the great amount of dust in the atmosphere.
Several bright flashes were observed between 7:30 and 9:00 which lighted up the sky and land with a red glare and were quickly followed by loud thunder.
8:40; Pitch dark, volcanic dust falling fast, intensely irritating to the eyes; impossible to see more than a few feet.
10:10 Volcanic dust falling more slowly; at 12 Mid thunder became less frequent.
6:00 Grounded lightning rods. 6:20 Took specimens of dust at various times for references; the first of which fell was finer than that which came later.</text>
https://catalog.archives.gov/OpaAPI/med ... 2_0173.JPG
Moored at Kodiak, Alaska. 7th June 1912.
0300 Fall of dust diminishing gradually and at 8 o'clock ceased.
The last dust to fall was light and white.
0800 measured fall of dust, found 3 1/4 to 5 inches had fallen since 7:10pm yesterday.
Endeavoured to establish wireless communications with Kodiak station but failed on account of excessive static.
0800 Light airs and breezes, WNW, NW and WSW, to calm, sky and all but immediate surroundings obscured br falling askes.
0910 Ashes stopped falling, lighter in color.
Surroundings visible for about 300yds until noon and very little falling dust.
Mer - $pm. Light variable airs and breezes to calm. Sky obscured by ashes.
12:30 Ashes commenced falling with increasing density and by 1PM it was impossible to see more than fifty feet.
By 2PM pitch darkness has set in though ashes were falling lightly.
During entire watch sheet lightning and thunder were observed. Heavy static disturbances noticed and wireless outfit out of commission for that reason.
Natives and others living in village were supplied with drinking water during this day – evidently only available supply in the vicinity.
4PM – Mid. Light variable airs and breeze: sky overcast with ashes. Thunder and lightning, the altter very brilliant.
8:15 People ashore noticed seismic disturbance. Ashes falling rapidly and at end of watch Officers and crew on decks all night and day and exhausted.
</text>
https://catalog.archives.gov/OpaAPI/med ... 2_0174.JPG
Moored at Kodiak, Alaska. 8th June 1912.
Mid-8am Light airs and calm.
Dark with heavy fall of ashes. Ashes very fine, rather dull and yellow in color.
Avalanches of dust coming off neighbouring hills and dense cloud of dust hanging in air.
Made preparations to take populace on board and commenced housing in ship as protection from ashes. Air pure.
8am - 4pm.
Light airs varying from NE to NW to calm and light to gentle NW breezes to calm.
By 10:00 had collected all people off the village and had quartered 149 in shed on wharf and 185 on the Manning.
The dense fall of ashes continued until about 2:30PM. These ashes were a bright orange color, very fine and intensely irritating to the eyes, and so thick as to make breathing difficult in the open air and had a slight sulphur odour at times.
At 2:30 fall of ashes became less dense, and by 3 o'clock the air was much clearer, the sky having a dull reddish glow in most directions and being bright red in spots
At 4 o'clock the atmosphere took on a uniform light greyish appearance similar to that at the early part of the disturbance dust falling slowly.
Calm to light SW'ly airs to gentle SW breeze; sky not visible.
Air gradually became clearer and objects were visible at a distance of about 200 yards.
It was decided to take all on board and proceed to the outer anchorage, from which place the vessel could stand out to sea of the conditions again became serious.
At 5:35, cast off in company of tub "Printer" to anchorage off Woody Island.
https://catalog.archives.gov/OpaAPI/med ... 2_0180.JPG
0800 Moderate to light WNW breeze; overcast; rain; heavy cloudy, which appeared to be smoke, came from westward; odour of chlorine and sulphur noticeable during morning.
0830 Three loud reports heard ashore; probably due to impact of avalanches of dust.
Moored at Kodiak, Alaska. 6th June 1912.
1700hrs
Shortly after 5 o'clock (1700hrs) a high yellowish cloud came up from the West and SW within three-quarters of an hour the sky was completely overcast.
Chain lightning was observed, and at 6pm volcanic dust began to fall slowly, greyish white in color.
It grew gradually darker and at 6:30 was almost pitch dark although 2 1/2 hours before sunset.
Thunder became quite frequent, but most of the electrical discharges were not visible owing to the great amount of dust in the atmosphere.
Several bright flashes were observed between 7:30 and 9:00 which lighted up the sky and land with a red glare and were quickly followed by loud thunder.
8:40; Pitch dark, volcanic dust falling fast, intensely irritating to the eyes; impossible to see more than a few feet.
10:10 Volcanic dust falling more slowly; at 12 Mid thunder became less frequent.
6:00 Grounded lightning rods. 6:20 Took specimens of dust at various times for references; the first of which fell was finer than that which came later.</text>
https://catalog.archives.gov/OpaAPI/med ... 2_0173.JPG
Moored at Kodiak, Alaska. 7th June 1912.
0300 Fall of dust diminishing gradually and at 8 o'clock ceased.
The last dust to fall was light and white.
0800 measured fall of dust, found 3 1/4 to 5 inches had fallen since 7:10pm yesterday.
Endeavoured to establish wireless communications with Kodiak station but failed on account of excessive static.
0800 Light airs and breezes, WNW, NW and WSW, to calm, sky and all but immediate surroundings obscured br falling askes.
0910 Ashes stopped falling, lighter in color.
Surroundings visible for about 300yds until noon and very little falling dust.
Mer - $pm. Light variable airs and breezes to calm. Sky obscured by ashes.
12:30 Ashes commenced falling with increasing density and by 1PM it was impossible to see more than fifty feet.
By 2PM pitch darkness has set in though ashes were falling lightly.
During entire watch sheet lightning and thunder were observed. Heavy static disturbances noticed and wireless outfit out of commission for that reason.
Natives and others living in village were supplied with drinking water during this day – evidently only available supply in the vicinity.
4PM – Mid. Light variable airs and breeze: sky overcast with ashes. Thunder and lightning, the altter very brilliant.
8:15 People ashore noticed seismic disturbance. Ashes falling rapidly and at end of watch Officers and crew on decks all night and day and exhausted.
</text>
https://catalog.archives.gov/OpaAPI/med ... 2_0174.JPG
Moored at Kodiak, Alaska. 8th June 1912.
Mid-8am Light airs and calm.
Dark with heavy fall of ashes. Ashes very fine, rather dull and yellow in color.
Avalanches of dust coming off neighbouring hills and dense cloud of dust hanging in air.
Made preparations to take populace on board and commenced housing in ship as protection from ashes. Air pure.
8am - 4pm.
Light airs varying from NE to NW to calm and light to gentle NW breezes to calm.
By 10:00 had collected all people off the village and had quartered 149 in shed on wharf and 185 on the Manning.
The dense fall of ashes continued until about 2:30PM. These ashes were a bright orange color, very fine and intensely irritating to the eyes, and so thick as to make breathing difficult in the open air and had a slight sulphur odour at times.
At 2:30 fall of ashes became less dense, and by 3 o'clock the air was much clearer, the sky having a dull reddish glow in most directions and being bright red in spots
At 4 o'clock the atmosphere took on a uniform light greyish appearance similar to that at the early part of the disturbance dust falling slowly.
Calm to light SW'ly airs to gentle SW breeze; sky not visible.
Air gradually became clearer and objects were visible at a distance of about 200 yards.
It was decided to take all on board and proceed to the outer anchorage, from which place the vessel could stand out to sea of the conditions again became serious.
At 5:35, cast off in company of tub "Printer" to anchorage off Woody Island.
https://catalog.archives.gov/OpaAPI/med ... 2_0180.JPG
0800 Moderate to light WNW breeze; overcast; rain; heavy cloudy, which appeared to be smoke, came from westward; odour of chlorine and sulphur noticeable during morning.
0830 Three loud reports heard ashore; probably due to impact of avalanches of dust.
Last edited by pommystuart on Fri Mar 05, 2021 8:51 pm, edited 5 times in total.
Re: Volcanic and seismic activity
I bet they were glad when that quietened down 
Re: Volcanic and seismic activity
It was a famous and very significant eruption:
https://www.usgs.gov/center-news/volcan ... al-reports
https://en.wikipedia.org/wiki/Novarupta
Lots of images here:
https://duckduckgo.com/?t=ffab&q=Alaska ... &ia=images
https://www.usgs.gov/center-news/volcan ... al-reports
https://en.wikipedia.org/wiki/Novarupta
Lots of images here:
https://duckduckgo.com/?t=ffab&q=Alaska ... &ia=images
Re: Volcanic and seismic activity
Fascinating!
Re: Volcanic and seismic activity
Impressive. I never thought of the largest volcanic eruption in the C20 happening in Alaska. 
Re: Volcanic and seismic activity
Me neither!
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pommystuart
- Posts: 1795
- Joined: Mon May 18, 2020 12:48 am
- Location: Cooranbong, NSW, Australia.
Re: Volcanic and seismic activity
More from the Big Bang.
https://catalog.archives.gov/OpaAPI/med ... 2_0227.JPG
08-16hrs
Odor of volcanic gas was noticed during first part of watch; white paintwork and brass fittings became discolored.
[They had just spent a long time painting and polishing the ship after the first explosion, now they have to do it over again. It's a hard life. ]
If the air damages the paintwork and brass fittings imagine what it does to the lungs.
https://catalog.archives.gov/OpaAPI/med ... 2_0227.JPG
08-16hrs
Odor of volcanic gas was noticed during first part of watch; white paintwork and brass fittings became discolored.
[They had just spent a long time painting and polishing the ship after the first explosion, now they have to do it over again. It's a hard life. ]
If the air damages the paintwork and brass fittings imagine what it does to the lungs.
Re: Volcanic and seismic activity
The wonder of science!Randi wrote: ↑Sat Mar 13, 2021 3:29 pm Study of Redoubt and other volcanoes improves unrest detection
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pommystuart
- Posts: 1795
- Joined: Mon May 18, 2020 12:48 am
- Location: Cooranbong, NSW, Australia.
Re: Volcanic and seismic activity
https://catalog.archives.gov/OpaAPI/med ... 2_0275.JPG
1527 Noticed two distinct shocks, probably earthquakes.
(Anchored at Kodiak)
1527 Noticed two distinct shocks, probably earthquakes.
(Anchored at Kodiak)