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Jan 16,, 8 tweets, 6 min read
#Nomuka #Tonga via Sentinel-1 #satellite, before and after the #HungaTongaHungaHaapai volcano eruption.
This island south of Nomuka looks to have been inundated, based on Sentinel-1 radar image (darker areas = water).
Using a new feature of @sentinel_hub here's a sequence of SAR radar before/Sentinel-2 true color before/and then SAR radar after where you can see where the reflectivity of the land has changed to water.
Nomuka #Tonga before/after the volcano eruption and tsunami. It would appear the main settlement on the lower left still has the major shiny buildings standing, but there is significantly more water indicated along the waterfront and in the lagoon/wet area in town.
Close view of Nomuka #Tonga before/after using @sentinel_hub - my interpretation is the middle section has evidence water intrusion and loss of structures. True color and 1/3 is a reference before the #tsunami.
Different band view of Nomuka #Tonga to show the tsunami before/after (similar satellite attitude/reflections to minimize differences from angles).
Comparison of various imaging in Nomuka. My amateur interpretation is the waves definitely hit here (south on left), largest structures intact, but possibly reflective stuff pushed up on the right side.
This reflective spot interesting. Not in any prior satellite photos, and it's above town on whatever might qualify as a hillside. #Nomuka -- my random guess is this is where everyone drove their vehicles/etc. to a high spot/safe spot from a tsunami) when the volcano erupted.

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More from @ai6yrham

Jan 17,
Mango Island #Tonga via Airbus SPOT imagery 1/16/22. Unfortunately the inhabited part of the island obscured by clouds. It appears either survivors or debris in a spot not normally occupied by people on lower right. Image
Reference image from 1/14/22 of Mango Island, you'll notice the bright spot visible in the other imaging not present. I suspect survivors of the tsunami put up some kind of shelter up at the high point of the island. Tent, leanto or stretcher. Looks like at least 5-6 people too ImageImageImage
Tough to tell 100% but I would put money on these being people around a tent or some kind of temporary structure. #MangoIsland #Tonga #tsunami Image
Read 6 tweets
Jan 17,
Kanokupolu #Tonga taken yesterday, 1/16/22 via Airbus SPOT #satellite. Post volcano/tsunami. High resolution image, this looks to me to be ashfall. ImageImage
#Tonga taken by Airbus SPOT on 1/16/22. This is (was?) Ha'atafu Beach and Haatafu Beach Resort, but it seems to me that there are structures missing on this side (the resort appears to me to be missing, or extremely covered with ash). Possible tsunami scouring on the beach. Image
Reference image in Google vs. this acquisition -- you can see the big building on the top right in both images, but none of the structures you'd expect at Ha'atafu Beach, Nuku'alofa itself. #tonga #tsunami #volcano ImageImage
Read 10 tweets
Jan 16,
Tonga Navy appears to have just reached the island of #Nomuka
This ship (the only one transmitting satellite AIS data) came from Nuku'afola this morning, when officials said they would be sending the Tonga Navy to the outer islands.
Found this video I had missed earlier from this location (FB Live... shot just as the seas were retreating. Hope this person made it up a hill, what was coming as likely worse)
Read 8 tweets
Jan 16,
Hunga-Tonga-Hunga-Ha'apai #volcano before/after the eruption. Sentinel-1 satellite (-20.48838, -175.28037)
Hunga-Tonga-Hunga-Ha'apai #volcano on the left, you can see the interference patterns on the waves from the tsunami impacts (another volcano on the right). The gob of stuff in the middle was not there before, maybe floating tephra or something else radar reflective.
No tracking details on these ships (premium satellite data) but there are a few fishing boats that got one heck of a wakeup call earlier. There's a few that were VERY close to the volcano. (60 miles away on open ocean).
Read 10 tweets
Jan 15,
Looks like the wind is blowing south/southeast, towards Jersey City. #Passaic #Fire Image
Read 17 tweets
Dec 30, 2021
#MarshallFire #Superior #Colorado Structure fire reported at 1119 W Enclave Cir. Quite a few other structures fires I have not posted, too many to track.
#MarshallFire #Superior #Colorado Hospital sounds like it may be evacuated, not sure which one.
#MarshallFire #Superior #Colorado Trying to stop the garbage truck from trying to still collect trash.
Read 37 tweets

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