Sean (@SeanTrek) profile picture

Sean

@SeanTrek
 Pacific Northwest
Joined July 2008
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Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)Photo by Sean (@SeanTrek)
A route change on my way to Bright Angel has led me through an unexpectedly diverse geological playground, Neretva Vallis! This ancient river channel – which carried most of the water that flowed into Jezero Crater billions of years ago – is filled with intriguing boulders.
This color image taken by Mastcam-Z on NASA's Perseverance Mars Rover shows a very noticeable light-toned boulder with dark speckles in a field of darker ones. Some on the science team speculate that the boulder's minerals were produced in a nearby subsurface magma sea that then bubbled to the surface where they cooled and solidified. Others consider the possibility that it could have been created far beyond the walls of Jezero and transported there by the swift Martian waters that flowed through this channel eons ago. Either way, the team believes this boulder is the first of its kind they’ve seen and won’t be the last as the rover travels further along the crater rim.

ALT This color image taken by Mastcam-Z on NASA's Perseverance Mars Rover shows a very noticeable light-toned boulder with dark speckles in a field of darker ones. Some on the science team speculate that the boulder's minerals were produced in a nearby subsurface magma sea that then bubbled to the surface where they cooled and solidified. Others consider the possibility that it could have been created far beyond the walls of Jezero and transported there by the swift Martian waters that flowed through this channel eons ago. Either way, the team believes this boulder is the first of its kind they’ve seen and won’t be the last as the rover travels further along the crater rim.

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Last nights #aurora was absolutely stunning in #saskatchewan shot at the great Sandhills, Blumenfeld Church and Mendham #northernlights #canada
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Signatures of the destructive wildfires on the island of #Maui in Hawai`i were seen in @NOAASatellites #GOES18/#GOESwest imagery -- more details on the CIMSS Satellite Blog: cimss.ssec.wisc.edu/satellit…… #HIwx @NWSHonolulu
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G4 (Severe) Levels Reached! If you have clear skies tonight, look for the aurora where it may be visible.
Image from NOAA Space Weather Prediction Center (@NWSSWPC)
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Absolutely mesmerizing view of "gravity waves" propagating along the "tropopause," or effective ceiling of the lower atmosphere, following the eruption of #HungaTonga this morning. The waves result from the plume's buoyancy bumping against the tropopause and causing ripples.
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NEW VIDEO: #CountryOverTrump VOLUME UP! Over 120 Republican traitors in Congress will gather on Wednesday to try and tear down this country. This video shows what they will really be standing for. Please share and help us get 15,000 retweets today!
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For decades, scientists have warned that rising temperatures would lead to more extreme weather, and we are seeing their predictions play out in horrifying detail. We refuse to stand by while our communities burn. We need action now - this cannot become our new normal.
Image from Climate Reality (@ClimateReality)
Image from Climate Reality (@ClimateReality)
Image from Climate Reality (@ClimateReality)
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”We are wiping wildlife from the face of the planet, burning our forests, polluting and over-fishing our seas and destroying wild areas. We are wrecking our world – the one place we call home – risking our health, security and survival here on Earth.” theguardian.com/environment/…
Humans exploiting and destroying nature on unprecedented scale – report

Humans exploiting and destroying nature on unprecedented scale – report

Animal populations have plunged an average of 68% since 1970, as humanity pushes the planet’s life-support systems to the edge

theguardian.com
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Smoke from the California fires has been lofted up into the atmosphere, and carried east across the country. Here's a look at the HRRR experimental smoke model through early Wednesday. #CAwx #CAfires
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Sean retweeted
USGS (@USGS) profile picture
USGS
@USGS16 Mar 2020
xitter.cf/USGSstore/status/12395…
USGS Store (@USGSstore) profile pictureUSGS Store@USGSstore16 Mar 2020
It's #FreeMapMonday! Retweet and follow us for a chance to win the map of the Eudoxus Quadrangle on the Moon! #USGSStore (U.S. residents only)
Image from USGS Store (@USGSstore)
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7 pm #GOES16 visible satellite update shows that smoke from the #CountyFire (formerly #GuindaFire) has now spread as far west as #Petaluma and as far south as #SanFrancisco, #Oakland, and #RedwoodCity. The County Fire is located in NW Yolo County. #CAwx
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Happy #FullDiskFriday! Today, in celebration of #EarthDay this weekend, we are sharing a very special image with all of you, this is our first #NOAA20 satellite view of the North Pole. We think that's pretty amazing. Learn more about this image: goo.gl/T1gQ4Y
Image from NOAA Satellites (@NOAASatellites)
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Nice overnight timelapse of that #Sierra blizzard from @Northstar_CA "snow stick cam" @nbcbayarea #CAwx
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Captured the line of rain/hail/snow advancing across the Bay Area this afternoon #timelapse
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Showers with small hail moving through the east bay at this time.
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Tue Jan 23 10:44:28 UTC 2018 event picture
Image from NWS Tsunami Alerts (@NWS_NTWC)
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Sean retweeted
KTVU (@KTVU) profile picture
KTVU
@KTVU12 Jan 2018
#Photobomb! This bird made a surprise appearance in @MarkTamayoKTVU weather report today!
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#CAstorm- The main line of the Union Pacific Railroad through Montecito is blocked with mudflow and debris due to heavy rains.
Image from SBCFireInfo (@EliasonMike)
Image from SBCFireInfo (@EliasonMike)
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#CAstorm- Damaged vehicles carried by mud flow and debris at the exit of the parking garage to The Montecito Inn at the corner of Olive Mill and Coast Village Road.
Image from SBCFireInfo (@EliasonMike)
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Wow! Smoke from #ThomasFire and other SoCal fires has made it all the way up the coast north of Eureka this afternoon! #cawx
Image from NWS Sacramento (@NWSSacramento)
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