Dave MacLean
@daveatcogs.bsky.social
GIS Faculty, Centre of Geographic Sciences (COGS); Fellow, Royal Canadian Geographical Society; co-Director, Esri Canada Centre of Excellence (COGS). My posts
Just getting started on bluesky
Astronaut photos-of-Earth maps: https://isspix.com/MapTourHowTo
Just getting started on bluesky
Astronaut photos-of-Earth maps: https://isspix.com/MapTourHowTo
Reposted by Dave MacLean
'Airglow America'
Airglow & a faint aurora heading into the west coast...
3,335 images from a time-lapse sequence photographed by Jonny Kim are repaired, remastered & retimed to create 4k UHD 3x real time video footage.
Credit: Jonny Kim / ISS / NASA / ESRS / Seán Doran
youtu.be/5n7Zhfi7Y_M
Airglow & a faint aurora heading into the west coast...
3,335 images from a time-lapse sequence photographed by Jonny Kim are repaired, remastered & retimed to create 4k UHD 3x real time video footage.
Credit: Jonny Kim / ISS / NASA / ESRS / Seán Doran
youtu.be/5n7Zhfi7Y_M
ISS - Airglow America
YouTube video by Seán Doran
youtu.be
December 17, 2025 at 7:15 PM
'Airglow America'
Airglow & a faint aurora heading into the west coast...
3,335 images from a time-lapse sequence photographed by Jonny Kim are repaired, remastered & retimed to create 4k UHD 3x real time video footage.
Credit: Jonny Kim / ISS / NASA / ESRS / Seán Doran
youtu.be/5n7Zhfi7Y_M
Airglow & a faint aurora heading into the west coast...
3,335 images from a time-lapse sequence photographed by Jonny Kim are repaired, remastered & retimed to create 4k UHD 3x real time video footage.
Credit: Jonny Kim / ISS / NASA / ESRS / Seán Doran
youtu.be/5n7Zhfi7Y_M
Reposted by Dave MacLean
Eruption of Popocatepetl.
Image taken by Sentinel-2 on Jan. 10, 2026.
Image taken by Sentinel-2 on Jan. 10, 2026.
January 12, 2026 at 11:01 PM
Eruption of Popocatepetl.
Image taken by Sentinel-2 on Jan. 10, 2026.
Image taken by Sentinel-2 on Jan. 10, 2026.
Reposted by Dave MacLean
Who are we? We’re the Nova Scotia Museum of Natural History, a part of the decentralized Nova Scotia Museum network.
#MNH #Museum #NovaScotia
(1/5?)
#MNH #Museum #NovaScotia
(1/5?)
January 13, 2026 at 2:48 PM
Who are we? We’re the Nova Scotia Museum of Natural History, a part of the decentralized Nova Scotia Museum network.
#MNH #Museum #NovaScotia
(1/5?)
#MNH #Museum #NovaScotia
(1/5?)
Reposted by Dave MacLean
'Caribbean Moon'
1,949 images from a time-lapse sequence photographed by Don Pettit are repaired, remastered & retimed to create this 4k UHD 3x real time video footage of a rising moon glinting off the Caribbean.
Credit: Don Pettit / ISS / NASA / ESRS / Seán Doran
youtu.be/2EeoXdYXbkU
1,949 images from a time-lapse sequence photographed by Don Pettit are repaired, remastered & retimed to create this 4k UHD 3x real time video footage of a rising moon glinting off the Caribbean.
Credit: Don Pettit / ISS / NASA / ESRS / Seán Doran
youtu.be/2EeoXdYXbkU
ISS - Caribbean Moon
YouTube video by Seán Doran
youtu.be
December 16, 2025 at 4:40 PM
'Caribbean Moon'
1,949 images from a time-lapse sequence photographed by Don Pettit are repaired, remastered & retimed to create this 4k UHD 3x real time video footage of a rising moon glinting off the Caribbean.
Credit: Don Pettit / ISS / NASA / ESRS / Seán Doran
youtu.be/2EeoXdYXbkU
1,949 images from a time-lapse sequence photographed by Don Pettit are repaired, remastered & retimed to create this 4k UHD 3x real time video footage of a rising moon glinting off the Caribbean.
Credit: Don Pettit / ISS / NASA / ESRS / Seán Doran
youtu.be/2EeoXdYXbkU
Reposted by Dave MacLean
In 1984, an excavator operator, preparing ground for a new office tower in downtown Halifax, scooped up a remarkable jumble of 18th-century urban life. @nsmarchaeology.bsky.social
January 12, 2026 at 4:28 PM
In 1984, an excavator operator, preparing ground for a new office tower in downtown Halifax, scooped up a remarkable jumble of 18th-century urban life. @nsmarchaeology.bsky.social
Reposted by Dave MacLean
True or false: The Canadian Shield contains some of the oldest exposed rocks on the planet. Comment “true” or “false” below and tell us which region of Canada fascinates you most!
January 12, 2026 at 4:16 PM
True or false: The Canadian Shield contains some of the oldest exposed rocks on the planet. Comment “true” or “false” below and tell us which region of Canada fascinates you most!
Reposted by Dave MacLean
Reposted by Dave MacLean
🚨 A large bush fire west of Seymour, Australia can be seen burning brightly on satellite imagery captured today. Direct Map Link: tinyurl.com/5c6zxjc3
#Bushfire #Victoria #Australia #Fire
#Bushfire #Victoria #Australia #Fire
January 9, 2026 at 3:00 AM
🚨 A large bush fire west of Seymour, Australia can be seen burning brightly on satellite imagery captured today. Direct Map Link: tinyurl.com/5c6zxjc3
#Bushfire #Victoria #Australia #Fire
#Bushfire #Victoria #Australia #Fire
Reposted by Dave MacLean
🌄 Good morning. The low rain clouds have become trapped in the Altyn-Emel #Mountains in #Kazakhstan, giving this landscape a wonderfully mystical mood. ⛰️ Don't you think so too? Have a great Monday! 🤗
#Photography #Landscape #EastCoastKin #Bluesky #BlueskyMonday #Nature #CentralAsia #MountainMonday
#Photography #Landscape #EastCoastKin #Bluesky #BlueskyMonday #Nature #CentralAsia #MountainMonday
January 12, 2026 at 11:02 AM
🌄 Good morning. The low rain clouds have become trapped in the Altyn-Emel #Mountains in #Kazakhstan, giving this landscape a wonderfully mystical mood. ⛰️ Don't you think so too? Have a great Monday! 🤗
#Photography #Landscape #EastCoastKin #Bluesky #BlueskyMonday #Nature #CentralAsia #MountainMonday
#Photography #Landscape #EastCoastKin #Bluesky #BlueskyMonday #Nature #CentralAsia #MountainMonday
Reposted by Dave MacLean
Photographer 'over the Moon' with iconic ET recreation two years in the making. 🔭 🧪 #astrophotography www.bbc.co.uk/news/article...
Photographer over the Moon with ET picture recreation two years in the making
The planets finally aligned for friends who spent two years trying to recreate an iconic movie scene.
www.bbc.co.uk
January 11, 2026 at 12:44 AM
Photographer 'over the Moon' with iconic ET recreation two years in the making. 🔭 🧪 #astrophotography www.bbc.co.uk/news/article...
Reposted by Dave MacLean
🌄 Good morning, everyone! ⛰️ Driving through the foothills of Tarbagatai in the far east of #Kazakhstan, near the border with China, offers a view of a barren & rugged – yet very impressive – landscape 🏞️, doesn't it? 😍 We wish you a relaxing Sunday. 🤗
#Stunday #Photography #Landscape #EastCoastKin
#Stunday #Photography #Landscape #EastCoastKin
January 11, 2026 at 10:49 AM
🌄 Good morning, everyone! ⛰️ Driving through the foothills of Tarbagatai in the far east of #Kazakhstan, near the border with China, offers a view of a barren & rugged – yet very impressive – landscape 🏞️, doesn't it? 😍 We wish you a relaxing Sunday. 🤗
#Stunday #Photography #Landscape #EastCoastKin
#Stunday #Photography #Landscape #EastCoastKin
Reposted by Dave MacLean
January 10, 2026 at 9:41 PM
Reposted by Dave MacLean
Iceberg #A23a today
10 Jan PM | 53°S 41,2°W | Zoom Earth zoom.earth/maps/satellite-hd/#view=-53.028906,-41.168674,9.57z/date=2026-01-10,pm
10 Jan PM | 53°S 41,2°W | Zoom Earth zoom.earth/maps/satellite-hd/#view=-53.028906,-41.168674,9.57z/date=2026-01-10,pm
January 10, 2026 at 10:47 PM
Iceberg #A23a today
10 Jan PM | 53°S 41,2°W | Zoom Earth zoom.earth/maps/satellite-hd/#view=-53.028906,-41.168674,9.57z/date=2026-01-10,pm
10 Jan PM | 53°S 41,2°W | Zoom Earth zoom.earth/maps/satellite-hd/#view=-53.028906,-41.168674,9.57z/date=2026-01-10,pm
Reposted by Dave MacLean
January 10, 2026 at 11:34 AM
Reposted by Dave MacLean
CREEK AND CREAK
the homophones
that I love most
are creek and creak
the brook that bends
around the breeze
trees trunks straining threateningly
that you might demand to... [Read More: IG, FB, Patreon, Substack]
January 4, 2026
St. Croix Cove, Nova Scotia
Year 19, Day 6629 of my daily journal.
the homophones
that I love most
are creek and creak
the brook that bends
around the breeze
trees trunks straining threateningly
that you might demand to... [Read More: IG, FB, Patreon, Substack]
January 4, 2026
St. Croix Cove, Nova Scotia
Year 19, Day 6629 of my daily journal.
January 6, 2026 at 10:14 PM
CREEK AND CREAK
the homophones
that I love most
are creek and creak
the brook that bends
around the breeze
trees trunks straining threateningly
that you might demand to... [Read More: IG, FB, Patreon, Substack]
January 4, 2026
St. Croix Cove, Nova Scotia
Year 19, Day 6629 of my daily journal.
the homophones
that I love most
are creek and creak
the brook that bends
around the breeze
trees trunks straining threateningly
that you might demand to... [Read More: IG, FB, Patreon, Substack]
January 4, 2026
St. Croix Cove, Nova Scotia
Year 19, Day 6629 of my daily journal.
Reposted by Dave MacLean
Meltwater on an iceberg. Astronaut Chris Williams took this image of iceberg #A23a from space station #ISS on 27 December 2025. The blue surface hints at meltwater. For comparison #Terra image from 28 December. Original eol.jsc.nasa.gov/SearchPhotos... @daveatcogs.bsky.social @aretsch.bsky.social
January 7, 2026 at 3:20 PM
Meltwater on an iceberg. Astronaut Chris Williams took this image of iceberg #A23a from space station #ISS on 27 December 2025. The blue surface hints at meltwater. For comparison #Terra image from 28 December. Original eol.jsc.nasa.gov/SearchPhotos... @daveatcogs.bsky.social @aretsch.bsky.social
Reposted by Dave MacLean
A strong 6.5-magnitude #earthquake⚡️ struck southwestern #Mexico on January 2, 2026, causing entire buildings 🏣 to sway near the San Marcos area in Guerrero.
🎬X @RapidReport
@sangasso.bsky.social
🎬X @RapidReport
@sangasso.bsky.social
January 6, 2026 at 12:37 PM
A strong 6.5-magnitude #earthquake⚡️ struck southwestern #Mexico on January 2, 2026, causing entire buildings 🏣 to sway near the San Marcos area in Guerrero.
🎬X @RapidReport
@sangasso.bsky.social
🎬X @RapidReport
@sangasso.bsky.social
Reposted by Dave MacLean
The Lady Scotia wood-burning stove was one a range of attractive enameled stoves made at Lunenburg Foundry in the 1920s. This stove came to the Museum of Industry directly from the kitchen where it had spent its working life. Imagine the smell of the bread cooking on a cold winter's day. #NovaScotia
January 6, 2026 at 1:52 PM
The Lady Scotia wood-burning stove was one a range of attractive enameled stoves made at Lunenburg Foundry in the 1920s. This stove came to the Museum of Industry directly from the kitchen where it had spent its working life. Imagine the smell of the bread cooking on a cold winter's day. #NovaScotia
Reposted by Dave MacLean
Krasheninnikov volcano in Kamchatka.
Image taken today by Sentinel-2.
Image taken today by Sentinel-2.
January 6, 2026 at 11:38 AM
Krasheninnikov volcano in Kamchatka.
Image taken today by Sentinel-2.
Image taken today by Sentinel-2.
Reposted by Dave MacLean
Eruption of Etna volcano in Sicily.
New fissure opened up on the eastern flank.
Image taken today by Sentinel-2.
New fissure opened up on the eastern flank.
Image taken today by Sentinel-2.
January 1, 2026 at 9:24 PM
Eruption of Etna volcano in Sicily.
New fissure opened up on the eastern flank.
Image taken today by Sentinel-2.
New fissure opened up on the eastern flank.
Image taken today by Sentinel-2.
Reposted by Dave MacLean
Ol Doinyo Lengai volcano in Tanzania.
The last active carbonatite volcano on Earth 😊🌋
Image taken by Sentinel-2.
The last active carbonatite volcano on Earth 😊🌋
Image taken by Sentinel-2.
December 31, 2025 at 3:09 PM
Ol Doinyo Lengai volcano in Tanzania.
The last active carbonatite volcano on Earth 😊🌋
Image taken by Sentinel-2.
The last active carbonatite volcano on Earth 😊🌋
Image taken by Sentinel-2.
Reposted by Dave MacLean
#Argentina: A massive power outage hit #BuenosAires and surrounding suburbs late Tuesday, Dec 30. As a heatwave grips the region ahead of #NewYear’s Eve, NASA’s nighttime imagery reveals large areas plunged into darkness across the metro area. 🎄⚡️🌑
🛰 #NASA
🌍 worldview.earthdata.nasa.gov
🛰 #NASA
🌍 worldview.earthdata.nasa.gov
December 31, 2025 at 1:53 PM
#Argentina: A massive power outage hit #BuenosAires and surrounding suburbs late Tuesday, Dec 30. As a heatwave grips the region ahead of #NewYear’s Eve, NASA’s nighttime imagery reveals large areas plunged into darkness across the metro area. 🎄⚡️🌑
🛰 #NASA
🌍 worldview.earthdata.nasa.gov
🛰 #NASA
🌍 worldview.earthdata.nasa.gov
Reposted by Dave MacLean
Good morning! I’m pretty good at judging where to put my tripod, but sometimes… 😅
Just for a laugh. Yes, that water is very cold.
#OceanDevotion
Just for a laugh. Yes, that water is very cold.
#OceanDevotion
December 31, 2025 at 12:40 PM
Good morning! I’m pretty good at judging where to put my tripod, but sometimes… 😅
Just for a laugh. Yes, that water is very cold.
#OceanDevotion
Just for a laugh. Yes, that water is very cold.
#OceanDevotion
Reposted by Dave MacLean
Final favourite pics: Waxing Gibbous Moon, the Pleiades, Venus and the Beehive, Waxing Crescent Moon.
December 31, 2025 at 12:45 PM
Final favourite pics: Waxing Gibbous Moon, the Pleiades, Venus and the Beehive, Waxing Crescent Moon.