Conversation so far:
How is Jack Johnson involved in charity ?
In 2008, musician Jack Johnson and his wife Kim created the Johnson Ohana Charitable Foundation, a non-profit public charity supporting environmental, art, and music education worldwide.
Did the musician Jack Johnson donate any money to charity?
Musician Jack Johnson donated $50,000 to GlobalGiving's Japan Earthquake and Tsunami Relief Fund.

Question: Did he help raise any money for other catastrophes?
Self-contained rewrite: Did the musician Jack Johnson help raise any money for other catastrophes besides the 2011 Tōhoku earthquake and tsunami?