Mars Express sees deep fractures on Mars
Deep fractures on Mars, some more than 1500 feet deep.
Deep fractures on Mars, some more than 1500 feet deep.
Tag: geology
Mars Express sees deep fractures on Mars
Inside the heart of the volcano
Arne Saknussemm would be proud: Inside the heart of the volcano.
Arne Saknussemm would be proud: Inside the heart of the volcano.
Indian scientists about to start drilling five mile deep borehole
Indian scientists are about to begin drilling a five-mile-deep borehole to study earthquakes.
Indian scientists are about to begin drilling a five-mile-deep borehole to study earthquakes.
Scientists find previously unknown deposits of CO2 on Mars
Scientists find a gigantic and previously unknown deposit of CO2 at Mars’ south pole.
“We already knew there is a small perennial cap of carbon-dioxide ice on top of the water ice there, but this buried deposit has about 30 times more dry ice than previously estimated,” said Roger Phillips of Southwest Research Institute in Boulder, Colo. Phillips is deputy team leader for the Mars Reconnaissance Orbiter’s Shallow Radar instrument and lead author of the report. . . . “When you include this buried deposit, Martian carbon dioxide right now is roughly half frozen and half in the atmosphere, but at other times it can be nearly all frozen or nearly all in the atmosphere,” Phillips said.
What this discovery means is that, depending on Mars’ orbital circumstances, its atmosphere can sometimes be dense enough for liquid water to flow on its surface.
Scientists find a gigantic and previously unknown deposit of CO2 at Mars’ south pole.
“We already knew there is a small perennial cap of carbon-dioxide ice on top of the water ice there, but this buried deposit has about 30 times more dry ice than previously estimated,” said Roger Phillips of Southwest Research Institute in Boulder, Colo. Phillips is deputy team leader for the Mars Reconnaissance Orbiter’s Shallow Radar instrument and lead author of the report. . . . “When you include this buried deposit, Martian carbon dioxide right now is roughly half frozen and half in the atmosphere, but at other times it can be nearly all frozen or nearly all in the atmosphere,” Phillips said.
What this discovery means is that, depending on Mars’ orbital circumstances, its atmosphere can sometimes be dense enough for liquid water to flow on its surface.
Liquefaction
The real disaster in Japan continues: Liquefaction.
The real disaster in Japan continues: Liquefaction.
Nyiragongo Crater: Journey to the Center of the World
Walking in Nyiragongo Crater in Africa. The pictures are stupendous.
Walking in Nyiragongo Crater in Africa. The pictures are stupendous.
Evidence that liquid water once existed on a comet
Scientists have found strong evidence that liquid water once existed in the interior of a comet.
Scientists have found strong evidence that liquid water once existed in the interior of a comet.
Martian Mud Volcanoes
Tallest Known Cliff in the Solar System
Defiant Japanese boat captain rode out tsunami
Another hero: Defiant Japanese boat captain who rode out tsunami.
Another hero: Defiant Japanese boat captain who rode out tsunami.
Neighbouring volcanoes on Mars
a giant potato in space
A statistical study says big quakes don’t trigger others far away
A new statistical study has concluded that big quakes don’t trigger others large quakes far away.
A new statistical study has concluded that big quakes don’t trigger others large quakes far away.
Nuclear Meltdown at Quake-Damaged Japanese Plant
This ain’t good: A nuclear meltdown appears to have occurred at the quake-damaged Japanese power plant.
This ain’t good: A nuclear meltdown appears to have occurred at the quake-damaged Japanese power plant.
Quake moved Japan coast 8 feet; shifted Earth’s axis
The earthquake moved Japan’s coast eight feet while shifting the Earth’s axis about four inches.
The earthquake moved Japan’s coast eight feet while shifting the Earth’s axis about four inches.
Panic buying as Hawaii and Pacific islands braced for killer waves to strike across thousands of miles of ocean
Hawaii and Pacific islands brace for killer tsunami waves to strike across thousands of miles of ocean.
More here about the situation in Japan.
Video:
Hawaii and Pacific islands brace for killer tsunami waves to strike across thousands of miles of ocean.
More here about the situation in Japan.
Video:
Hawaii’s Kilauea volcano erupts with greater fury
Hawaii’s Kilauea volcano erupts.
Hawaii’s Kilauea volcano erupts.
Enceladus’s hotspot is far hotter than predicted
The tiger stripe fissures on Saturn’s moon Enceladus have turned out to be far hotter than predicted.
The tiger stripe fissures on Saturn’s moon Enceladus have turned out to be far hotter than predicted.
Drillers will stop injections for fear of earthquakes in Arkansas
Two drill companies will temporarily cease work in Arkansas to see if this action will cause the recent swarms of earthquakes there to ease.
Two drill companies will temporarily cease work in Arkansas to see if this action will cause the recent swarms of earthquakes there to ease.
Some unusual commercial caves
A look at some truly different commercial caves.
A look at some truly different commercial caves.
NASA’s chief technologist admits it will be a decade before Orion flies
This is why I call it pork and a waste of money: NASA’s chief technologist admits it will be a decade before Orion and the heavy-lift rocket mandated by Congress flies.
This is why I call it pork and a waste of money: NASA’s chief technologist admits it will be a decade before Orion and the heavy-lift rocket mandated by Congress flies.
The caves of Copernicus
and the Ocean of Storms
The discovery of new caves on the Moon keep coming. Today I have two new stories. The first is a discovery by professional scientists of a giant lava tube cave in the Oceanus Procellarum or Ocean of Storms. The second is the detection of a plethora of caves and sinks on the floor of the crater Copernicus, found by a NASA engineer who likes to explore the gobs of data being accumulated by Lunar Reconnaissance Orbiter and made available to all on the web.
The image below of the Moon’s near side, taken by India’s Cartosat-2A satellite and taken from the science paper, shows the location of lava tube in Oceanus Procellarum (indicated by the red dot) and the crater Copernicus.
First the professional discovery. Yesterday, the Times of India reported the discovery of lava tube more than a mile long on the Moon. I did not post a link to the article because I didn’t think the news story provided enough information to make it worth passing along. Today however, fellow caver Mark Minton emailed me the link where the actual research paper could be downloaded [pdf]. This I find definitely worth describing.
» Read more
More on New Zealand quake
More on the New Zealand earthquake: Curfew imposed as death toll climbs to 75.
More on the New Zealand earthquake: Curfew imposed as death toll climbs to 75.
Thousands flee as Philippine volcano erupts
Thousands flee as Philippine volcano erupts.
Thousands flee as Philippine volcano erupts.
The Earth’s shifting magnetic pole
More quakes in Arkansas, including a 4.3
The mysterious swarm of earthquakes in Arkansas keep coming, including a 4.3 quake today.
The mysterious swarm of earthquakes in Arkansas keep coming, including a 4.3 quake today.
A potential landing site for next Mars rover
This week’s release of cool images from Mars Reconnaissance Orbiter included the color image below of a region on the floor of Holden Crater, one of the four possible landing sites for Curiosity, the Mars Science Laboratory planned for launch later this year. (If you want to see the entire image at higher resolution, you can download it here.)
Two things that immediately stand out about this image (other than this looks like an incredibly spectacular place to visit):
Stardust images of comet locate crater from Deep Impact’s impact
More news from Stardust: scientists have now identified what they think is the crater produced by Deep Impact’s impact in 2005. Key quote:
The images revealed a 150-metre-wide crater at the Deep Impact collision point that was not present in 2005. The crater is a subtle feature in the images, but it appears consistently in multiple views from the spacecraft. “So I feel very confident that we did find the [impact] site,” said mission member Peter Schultz of Brown University in Providence, Rhode Island, at a press briefing on Tuesday. The crater’s features are “subdued” rather than sharply defined, like those of craters made in hard materials like rock. “The message is: This surface of the comet where we hit is very weak,” said Schultz. The crater also has a small mound in its middle, indicating that some of the material thrown up by the impact was drawn by the comet’s gravity back down into the crater, he said: “In a way, it partly buried itself.”
More news from Stardust: scientists have now identified what they think is the crater produced by Deep Impact’s impact in 2005. Key quote:
The images revealed a 150-metre-wide crater at the Deep Impact collision point that was not present in 2005. The crater is a subtle feature in the images, but it appears consistently in multiple views from the spacecraft. “So I feel very confident that we did find the [impact] site,” said mission member Peter Schultz of Brown University in Providence, Rhode Island, at a press briefing on Tuesday. The crater’s features are “subdued” rather than sharply defined, like those of craters made in hard materials like rock. “The message is: This surface of the comet where we hit is very weak,” said Schultz. The crater also has a small mound in its middle, indicating that some of the material thrown up by the impact was drawn by the comet’s gravity back down into the crater, he said: “In a way, it partly buried itself.”
Researchers discover a new set of deep-sea volcanic vents in the south Pacific
Researchers have discovered a new set of deep-sea volcanic vents in the south Pacific, suggesting these vents are more common than previously believed. Key quote:
Using an underwater camera system, the researchers saw slender mineral spires about 10 feet tall, with hot water gushing from their peaks, and white mats of bacteria coating their sides. The vents are at a depth of 1,706 feet in a newly discovered seafloor crater close to the South Sandwich Islands, a remote group of islands about 310 miles southeast of South Georgia.
Researchers have discovered a new set of deep-sea volcanic vents in the south Pacific, suggesting these vents are more common than previously believed. Key quote:
Using an underwater camera system, the researchers saw slender mineral spires about 10 feet tall, with hot water gushing from their peaks, and white mats of bacteria coating their sides. The vents are at a depth of 1,706 feet in a newly discovered seafloor crater close to the South Sandwich Islands, a remote group of islands about 310 miles southeast of South Georgia.
The underground Moon
More images of lunar cave pits have been posted by the scientists of Lunar Reconnaissance Orbiter (LRO). They have also published their first paper [pdf] about these cave pits for the 2011 Lunar and Planetary Science Conference taking place in March. The paper summarizes, with images, what is know about the three pits on the Moon that have each been imaged a number of times at different angles and lighting situations.
