A significant Ukrainian drone assault on Russia caused an earthquake-sized eruption at a major arsenal in the Tver region on Wednesday, forcing citizens in the city of Toropets to evacuate, according to reports from war bloggers and some media.<br /><br />Unverified video and images on social media showed a huge ball of flame rising into the night sky and numerous explosion detonations tearing across a lake about 240 miles west of Moscow, Reuters reported.