Mars Avalanche Caught in Action

abq_farside · Mar 5, 2008

Pretty CoolhiRISE <img src="http://sitelife.space.com/ver1.0/Content/images/store/15/8/cf9c41b7-244e-4410-888c-09ab3cbf7ce8.Medium.jpg" alt="" /> <div class="Discussion_UserSignature"> Don't let who you are keep you from becoming who you want to be! </div>

derekmcd · Mar 5, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Pretty CoolhiRISE Posted by abq_farside</DIV>We've only been really active there a few years, and we're already causing global warming. <img src="http://sitelife.space.com/ver1.0/Content/images/store/11/9/dbf20172-1048-4cf0-a9ef-dd849a182e1a.Medium.gif" alt="" />    <div class="Discussion_UserSignature"> <div> </div> <div>"If something's hard to do, then it's not worth doing." - Homer Simpson</div> </div>

PistolPete037 · Mar 5, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>We've only been really active there a few years, and we're already causing global warming.    Posted by derekmcd</DIV>It's Bush's fault too. <img src="http://sitelife.space.com/ver1.0/Content/images/store/9/9/29986d21-09b9-4a88-b9ab-a283b2c303da.Medium.gif" alt="" /> <div class="Discussion_UserSignature"> Board users see you as: PistolPete (Jonathon Payne), solar system, with 2491 posts </div>

Mee_n_Mac · Mar 5, 2008

Was there any overlap from this pic to the ones before or after ? <div class="Discussion_UserSignature"> -----------------------------------------------------Ask not what your Forum Software can do do on you,Ask it to, please for the love of all that's Holy, STOP ! </div>

symbolite · Mar 5, 2008

Would be awesome if more pics were taken so a gif image could be made of the dust slowly blowing away. <div class="Discussion_UserSignature"> </div>

abq_farside · Mar 5, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Was there any overlap from this pic to the ones before or after ? Posted by mee_n_mac</DIV> Over on the Bad Astronmy site somebody (I think it was Andrew, 3488) had posted a before and after pic.  I will see if I can find it. <div class="Discussion_UserSignature"> Don't let who you are keep you from becoming who you want to be! </div>

freya · Mar 6, 2008

I recall reading a New Scientist article 10 or more years ago, which had a sequence of 2 or 3 pics from Viking II orbiter that appear to have captured an avalanche in progress. The area may have been around Valles Marineris.A quick google search has not turned these images up. 'Anyone out there' recall what I am talking about ?What are the chances of a few dispersed orbiting cameras taking a snapshot of these things. Mars must have a lot of them. Watch out, future explorers.  <div class="Discussion_UserSignature"> </div>

JonClarke2 · Mar 6, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>What are the chances of a few dispersed orbiting cameras taking a snapshot of these things. Mars must have a lot of them. Watch out, future explorers.  Posted by freya</DIV>Don't loiter under polar cliffs in the thaw

derekmcd · Mar 6, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Don't loiter under polar cliffs in the thaw

Posted by JonClarke2</DIV>__________________________I posted in the blog on SDC article that landing the Phoenix near this site is probably out of the question.  It really is fascinating how dynamic Mars actually is.  <div class="Discussion_UserSignature"> <div> </div> <div>"If something's hard to do, then it's not worth doing." - Homer Simpson</div> </div>

Mee_n_Mac · Mar 6, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Over on the Bad Astronmy site somebody (I think it was Andrew, 3488) had posted a before and after pic.  I will see if I can find it. Posted by abq_farside</DIV> I've seen 3488's comparison pics (this one vs 1 year ago) over at the 'Port but what I was wondering was if this pic was 1 in a series of pics mapping the surface.  If so then there's often a bit of geographical overlap between pics and in this case we might then get a just before or (more) just after pic in addition to the "during" pic presented here. Then again the fall might be in an area where an immediate before or after pic doesn't overlap. <div class="Discussion_UserSignature"> -----------------------------------------------------Ask not what your Forum Software can do do on you,Ask it to, please for the love of all that's Holy, STOP ! </div>

3488 · Mar 6, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Pretty CoolhiRISE Posted by abq_farside</DIV> Cheer's abq_farside,It is, absolutely fantastic, this observation along with the MESSENGER Mercury encounter are among my fave's so far this year. You can bet the the HiRISE will be observing this same spot regularly now & else where that shares similar traits. I wonder if CRISM will be used to spectrally examine the newly exposed bedrock & ice?I hope so, we'll learn much from this & also can be used in context with Phoenix results, when she arrives.Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

weeman · Mar 6, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>We've only been really active there a few years, and we're already causing global warming.    Posted by derekmcd</DIV> Well, the pollutants put out by the rovers are devastating to the Martian environment! We need some hybrid rovers!!

<div class="Discussion_UserSignature"> Techies: We do it in the dark. "Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity." -Albert Einstein </div>

centsworth_II · Mar 6, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>....We need some hybrid rovers!! Posted by weeman</DIV> <div align="left"><ul><li>The rovers are solar powered -- better than hybrid!</li><li>The MSL rover arriving in 2010, now THAT will likely </li><li>get some flack for leaving nuclear waste on Mars. </li></ul></div> <div class="Discussion_UserSignature"> </div>

bdewoody · Mar 7, 2008

I'm wondering since there are no quakes, or events to transmit sounds on Mars what caused the avalanche. <div class="Discussion_UserSignature"> Bob DeWoody </div>

centsworth_II · Mar 7, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>I'm wondering since there are no quakes, or events to transmit sounds on Mars what caused the avalanche. Posted by bdewoody</DIV> Lots of speculation: One good thought is that as layers of CO2 ice sublimate (turn to gas), a layer of dust that was previously supported by the frozen CO2 falls.  Another idea (not mine) is that as CO2 ice on the cliff face sublimates, dust contained within the ice remains as a fragile, void-filled layer  until it can no longer support it's weight and falls.Some also think that these might not be avalanches at all but  dust clouds blown up by winds at the cliff base.  Or, these are clouds formed by jets of CO2 gas escaping from heated layers in the face of the cliff.As you can see, there may not be a quick, easy explanation.Many of these ideas and others are discussed in this unmannedspaceflight.com thread: http://www.unmannedspaceflight.com/index.php?showtopic=5003&st=0    <div class="Discussion_UserSignature"> </div>

Philotas · Mar 7, 2008

Replying to: <DIV CLASS='Discussion_PostQuote'>Pretty CoolhiRISE Posted by abq_farside</DIV> To be more precise, it was in fact four avalanches that was caught in action (speaking of which I am only able to see two myself

). <div class="Discussion_UserSignature"> </div>

3488 · Mar 7, 2008

I'm wondering since there are no quakes, or events to transmit sounds on Mars what caused the avalanche. Posted by bdewoody[/QUOTE]Marsquakes are not disproven. The Viking 1 seismometer failed completely & the Viking 2 seismometer picked up very light Marsquakes & Viking 2's own arm movements.It would be quite something for all future static landers to carry seismometers, seeing thus far, we have had results from only one.It is a great shame that Mars Phoenix Lander is not carrying one or that Mars Pathfinder did not carry one.With the MERs, MSL & ExoMars Rovers, it is more difficult as the suspension systems will dampen out Marsquakes.It is not even proven as yet that the volcanoes are truly extinct, although in all probability there are, though Olympus Mons, Arsia Mons, Hecates Tholus etc do show some young looking lava flows (not cratered or eroded very much).The jury is still out.Regarding this landslide, I suspect it is seasonal. It will be the Martian Northern Summer Solstice on Tuesday 24th June 2008 (only three days after the equivalent on Earth). So now it is what, the equivalent of early May, so it is well into Spring now at this location. Still pretty cold, only just started warming up from Winter, but is warming up & out gassing events, dry ice sublimation, etc will be occuring now.Andrew Brown. <div class="Discussion_UserSignature"> "I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before". Linda Morabito on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.http://www.launchphotography.com/ http://anthmartian.googlepages.com/thisislandearthhttp://web.me.com/meridianijournal </div>

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Mars Avalanche Caught in Action

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