This website is the digital version of the 2014 National Climate Assessment, produced in collaboration with the U.S. Global Change Research Program. For the official version, please refer to the PDF in the downloads section.
Lahars move rapidly down valleys like rivers of concrete. If you are on the floor of a valley that leads from a volcano and become aware of an oncoming lahar, seek high ground. Lahar is an Indonesian term that describes a hot or cold mixture of water and rock fragments that flows down the slopes of a volcano and typically enters a river valley.
The lunakhods could travel up to 2 km / hour. The lunar rovers were even faster, fastest 11 mph, and with more bandwith we could drive rovers on the Moon as fast as them from Earth. We could send vehicles like that to Mars. Lunakhod 2 was 840 kg, and Curiosity, 899 kg, so they are similar size.