article_snippet.sent: Scientists say the same area will be covered under the same geometry every 12 days, allowing for the wider region to be regularly monitored for changes in the land.
article_snippet.sent: The red squares show road blockss, the green people markers show crowds, red dots are areas that are destroyed and yellow dots are areas that are possibly affected.
article_snippet.sent: The yellow lines mark out primary roads in the area .
article_snippet.sent: Not much change is visible because of a fresh coat of snow and cloud cover.