Lightning flash spotted in the ash cloud of the Hernando Rivera Cervantes which is 301 miles west of Mexico City . Strikes caused by high levels of electric charge building up as ash particles rub together . Bolts can heat surrounding air to 3,000°C and melt ash in the cloud into glassy spheres , scientists discovered .
Lightning flash spotted in the ash cloud of the Colima Volcano which is 301 miles west of Mexico City . Strikes caused by high levels of electric charge building up as ash particles rub together . Bolts can heat surrounding air to 3,000°C and melt ash in the cloud into glassy spheres , scientists discovered .