Results 61 to 70 of about 38,084 (153)

Satellite‐Based Assessment of Methane Emissions From the Darvaza Gas Crater

Geophysical Research Letters
Methane is a potent greenhouse gas, and the Darvaza crater in Turkmenistan is a rare, persistent emitter. There are uncertainties regarding its formation date (either 1963 or 1971), fire ignition, and the fire's influence on methane release.
Adriana Valverde, Itziar Irakulis‐Loitxate, Javier Gorroño, Zhipeng Pei, Javier Roger, Luis Guanter   +5 more
doaj   +1 more source

Experimental Investigation of the Crater Caused by Hypervelocity Rod Projectile Impacting on Rocks

Shock and Vibration, 2020
To investigate the cratering effects of hypervelocity rod projectile impacting on rocks, a two-stage light gas gun was used to carry out 10 groups of small-scale experiments, whose velocity ranges from 1.5 km/s to 4.1 km/s.
Yanyu Qiu, Songlin Yue, Mingyang Wang, Gan Li, Yihao Cheng, Zhangyong Zhao, Zhongwei Zhang   +6 more
doaj   +1 more source

The influence of the acid water of the Banyupait River on the community health in Bantal village, Asembagus, Indonesia

Water Science and Technology
The pH of Mount Ijen crater water is 0-2, resulting in water that is acidic and sulfurous. A fault near the Mount Ijen Crater causes seepage so that acidic water flows into the Banyupait River.
Dwi Fitri Yudiantoro, Bambang Irawan, Intan Paramita Haty, Setia Pambudi, Shalva Tmy, Arum Suproborini, Sekar Bawaningrum, Paramita Ismaya, Mirzam Abdurrachman, Isao Takashima, Temmy Wikaningrum, Noor Cahyo Aryanto   +11 more
doaj   +1 more source

Guidebook to the geology of Barringer Meteorite Crater, Arizona (a k a Meteor Crater) : for the 80th Annual Meeting of the Meteoritical Society July 2017 [PDF]

, 2017
prepared by David A. Kring.Introduction--Target Stratigraphy--Pre-impact Structure--Barringer Meteorite Impact Crater--Shock Metamorphism and Impact Melting--Crater Rim Uplift and Crater Wall Collapse--Overturned Rim Sequence--Distribution of Ejecta ...
Kring, David A. (David Allen), https://orcid.org/0000-0002-3440-6282   +1 more
core  

Phantom Ship, Crater Lake National Park

, 1970
Postcard of the Phantom Ship in Crater Lake National Park. | Towering more than 165 feet above Crater Lake's blue, the Phantom Ship, formed by the volcano whose eruptions created the lake, serenely withstands the centuries.photographic ...

core  

Shoemaker Crater-Going Where We Can "See" [PDF]

, 2006
The recommended impact site for LCROSS is Shoemaker crater, centered at 88.1 S, 45 E. This 51-km diameter crater is in permanent shadow. However, more than half of its floor has been imaged by Earth-base radar.
Allen, Carl C.
core  

Exploration of Victoria Crater by the Mars Rover Opportunity [PDF]

, 2009
The Mars rover Opportunity has explored Victoria crater, a ~750-meter eroded impact crater formed in sulfate-rich sedimentary rocks. Impact-related stratigraphy is preserved in the crater walls, and meteoritic debris is present near the crater rim.
Clark, Benton C, Squyres, Steven W, Fleischer, Iris, Christensen, Philip R, Knoll, Andrew H, de Souza Jr, Paulo A, Edgar, Lauren A, Arvidson, Raymond E, Schröder, Christian, Cohen, Barbara A, Calvin, Wendy M, Farrand, William H, Bell III, James F, Ashley, James W, Gellert, Ralf, Golombek, Matthew P., Edgar, Lauren A., Farrand, William H., Sullivan, Robert J., Rice, James W. Jr, Ming, Douglas W., Knoll, Andrew, Calvin, Wendy M., Clark, Benton C., Grotzinger, John P., de Souza, Paulo Jr., Ashley, James W., Klingelhöfer, Göstar, Hayes, Alexander G., McCoy, Timothy J., McLennan, Scott M., Jolliff, Bradley L., Yen, Albert, Grant, John A., Morris, Richard V., Christensen, Philip R., Herkenhoff, Ken E., Cohen, Barabara A., Johnson, Jeffrey R., Squyres, Steven W., Yingst, R. Aileen, Li, Ruogu, Bell, James F. III, Knudson, Amy, Arvidson, Raymond E.   +44 more
core   +1 more source

A Review of Deep Space Image-Based Navigation Methods

Aerospace
Deep space exploration missions face technical challenges such as long-distance communication delays and high-precision autonomous positioning. Traditional ground-based telemetry and control as well as inertial navigation schemes struggle to meet mission
Xiaoyi Lin, Tao Li, Baocheng Hua, Lin Li, Chunhui Zhao   +4 more
doaj   +1 more source

Projectile Velocity and Crater Formation in Water

International Scholastic Journal of Science, 2010
The relationship between the velocity of impact and maximum crater diameter was found for two steel balls dropped into water using 300 fps video. The maximum diameter of the crater was found to be proportional to the impact velocity and independent of ...
Pravitra Chaikulngamdee, Shao-Hui Chuang, Hyun Gyu Kim, Hyeon Ik Song   +3 more
doaj  

Crater Triangle Matching Algorithm Based on Fused Geometric and Regional Features

Aerospace
Craters are regarded as significant navigation landmarks during the descent and landing process in small body exploration missions for their universality.
Mingda Jin, Wei Shao
doaj   +1 more source