Weather Blog Blast From the Past: Vredefort Crater The world’s oldest and largest known impact structure shows some of the most extreme deformation conditions known on Earth. Read More… About Author OTW Observer See author's posts Post navigation Previous Wimbledon close to its hottest day ever as temperatures soar past 34CNext Tropical Storm Chantal could Develop… Related Stories A School of Mud Volcano Islands in Azerbaijan Weather Blog A School of Mud Volcano Islands in Azerbaijan April 21, 2026 Thailand’s Krabi Coast Weather Blog Thailand’s Krabi Coast April 20, 2026 Spring Rains Saturate Michigan Weather Blog Spring Rains Saturate Michigan April 17, 2026