This is the music that plays during the final wave of the new emergency quest: Mining base Invasion on pso2. Both versions (When the bases are not in trouble, and when a base is about to or been blown up) are included.
Note: I take no credit for this recording, the original video is located here: http://www.nicovideo.jp/watch/sm22483491 I just re-recorded it and uploaded it to youtube for those that didn't have accounts. (I will also have no problems removing this if the original uploader wishes it).