Some of those people might also know Japanese too, but for those who don't, this is the better English source, as it will give you the affected areas and how much shaking based on the Japanese shindo scale etc:
http://www.jma.go.jp/en/quake/
In case of a major event, NHK (Channel 1 on basic tv) will have English on their secondary audio feed. News Watch 7 and News Watch 9 (weekdays at 7pm and 9pm) are also translated into English (secondary audio feed).