Simplify the following text for a Grade 7 native English-speaking person.
Original: Although it brought no lava flow , the Hoei eruption released some 800 million cubic meters of volcanic ash , which spread over vast areas around the volcano , even reaching Edo almost 100 km away .
Simplified: There was no lava flow , but the Hoei eruption released at least 800 million cubic meters of volcanic ash . This ash spread over very large areas around the volcano .