Original: The 1707 HÅ ei earthquake, which occurred at 14:00 local time on October 28, 1707, was the largest in Japanese history until the 2011 TÅ hoku earthquake surpassed it.
Simplified: The 1707 HÅ ei earthquake happened at 14:00 local time on 28 October 1707. It was the largest earthquake in Japanese history.