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Arsia Mons Anomaly?, Recent Mars Express Imagery shows odd feature
Hungry4info
post Oct 1 2018, 03:05 AM
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From 25 Sep 2018.
https://www.flickr.com/photos/esa_marswebcam/44942993631/


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Steve5304
post Oct 1 2018, 03:47 AM
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QUOTE (Hungry4info @ Oct 1 2018, 03:05 AM) *



The spiral clouds normally over the location are totally different. This is a volcanic eruption of some sort or venting. Lots of others taking notice say the same.


hopefully we get some better shots.

Began on the 19th..considering the size of this it would be equivalent to yellowstone calderaa if it were a full blown event. Yikes. That would be exciting..unlikely.
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mcaplinger
post Oct 1 2018, 04:23 AM
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QUOTE (Steve5304 @ Sep 30 2018, 07:47 PM) *
hopefully we get some better shots.

http://www.msss.com/msss_images/latest_weather.html

QUOTE
Condensate water ice clouds endured above Arsia Mons (southernmost volcano of the Tharsis Montes), signaling a return to seasonal martian norms after the recent planet-encircling dust event.



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Steve5304
post Oct 1 2018, 11:49 AM
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QUOTE (mcaplinger @ Oct 1 2018, 05:23 AM) *



Lame if true mad.gif
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nprev
post Oct 1 2018, 12:31 PM
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This is a well-known phenomenon that has been well-documented for many decades. If there was any sort of volcanic activity on this scale THEMIS onboard Mars Odyssey as well as other IR instruments in the flotilla of orbital assets would have doubtless observed it many years ago.



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mcaplinger
post Oct 1 2018, 03:20 PM
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QUOTE (Steve5304 @ Oct 1 2018, 03:49 AM) *
Lame if true mad.gif

So sorry if reality bores you. rolleyes.gif

The VMC image is mostly striking because Arsia Mons is so close to the terminator and the cloud shadow is long.


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hendric
post Oct 1 2018, 03:47 PM
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How can we tell if this is just clouds caused by orographic lift, or minor amounts of water vapor escaping the volcano and condensing?

Be interesting to compare Methane levels vs the cloud's appearance/disappearance.

This article is very interesting

http://www.psrd.hawaii.edu/May11/Mars_volc_timeline.html


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Steve5304
post Oct 1 2018, 03:53 PM
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QUOTE (mcaplinger @ Oct 1 2018, 03:20 PM) *
So sorry if reality bores you. rolleyes.gif

The VMC image is mostly striking because Arsia Mons is so close to the terminator and the cloud shadow is long.



Pfff.......

Like you would of not wanted to see a glowing red caldera on mars ..so keep on rollin em bud rolleyes.gif rolleyes.gif rolleyes.gif
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hendric
post Oct 1 2018, 04:12 PM
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Dr Robbins provided a link to his article to share with us. I believe this is covered under "non-commercial and educational use".

http://about.sjrdesign.net/files/papers/20...es_Personal.pdf


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Gerald
post Oct 1 2018, 04:23 PM
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QUOTE (hendric @ Oct 1 2018, 05:47 PM) *
How can we tell if this is just clouds caused by orographic lift, or minor amounts of water vapor escaping the volcano and condensing?

Wouldn't we see tiny well-defined vents releasing immediately condensing water vapor in HiRISE images, even if no larger-scale increased surface temperature is detectable?
Accompanying gases like CO2, CH4, SO2, H2S, and so on should also be increased, and leave a cover of precipitated minerals typical for residual volcanic activity. Such precipitates should be detectable from orbit. Does there exist any according publication regarding ancient mars volcanoes pointing towards this kind of hints towards ongoing residuals of active volcanism?
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Gerald
post Oct 1 2018, 05:29 PM
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Here is a link to the Wikipedia article about lenticular clouds. I'd think, that alternative hypotheses will need to compete with this settings.
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Phil Stooke
post Oct 1 2018, 05:59 PM
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Any substantial venting would produce changes in atmospheric chemistry which would be detectable by SAM on Curiosity (which routinely does atmospheric analysis) and by MAVEN, and now certainly by TGO. Since there is a history of seeing these clouds, that would show up in the data. If it's not been found, it's not there.

Phil


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JRehling
post Oct 1 2018, 06:12 PM
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In two months, we'll have a seismometer on the surface. The comments here are persuasive that we already know what's going on with Arsia Mons, but it'll be nice to have that added source of information and see if any trembling is happening at any of Mars' gigantic volcanoes.
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Steve5304
post Oct 2 2018, 05:17 PM
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QUOTE (JRehling @ Oct 1 2018, 07:12 PM) *
In two months, we'll have a seismometer on the surface. The comments here are persuasive that we already know what's going on with Arsia Mons, but it'll be nice to have that added source of information and see if any trembling is happening at any of Mars' gigantic volcanoes.



I believe this is the first of its kind...I think Mars 3 had one on it but crashed.


Will be nice to put the issue to rest about those big volcano's and when they were last active. And more importantly tectonics (or lack of)

I had read a paper in the 90's already that those volcano's were responsible for periodic heating of the planet, thickening of atmosphere, water washing out on the surface and melting of caps. Which was why i was so excited when i saw this. The paper had very compelling evidence..with previous evidence of violent eruptions.Those are pretty big volcano's and an eruption across the surface would be game changing for the next 100,000 years
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JRehling
post Oct 2 2018, 07:29 PM
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Just because ancient volcanic eruptions in a different era change the climate profoundly does not mean that any eruption now would do so. Volcanic eruptions are not a unit event – some of them are thousands of times bigger than others, and we should automatically be suspicious of the likelihood of any profound changes taking place in one human lifetime.

The expected change in martian climate during out lifetimes has to be nearly zero. Tiny probability of great change; greater probability of very small change. The same is true of each given world. These things move slowly.
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