For quite some time, I always was too slow to solve the WoGE puzzles, if I even managed to give a try at all. (For a description what WoGE is, see below the fold. Previous WoGEs are collected on Felix Bossert's blog and in Ron Schott's KML.)
Matthew's WoGE 331 was rather difficult, especially since I completely missed one special feature. However, the remaining information in the pictures and text (Matthew published several clues after some time) where enough, with some persistence, to find that volcanic island located in a back-arc basin.
Now I may come up with a new puzzle. For a change, it should be a bit easier (I hope), to give newcomers a chance.
For any new players to Where on (Google) Earth, simply post a comment with latitude and longitude and write something about the (geologic) feature in the picture; in this case especially why these bright rectangles are found here. If you win, you get to host the next one.
Because this WoGE should be rather easy, I invoke Schott's Rule: former winners have to wait until posting for 1 hour for each WoGE they got right. I will post some hints if there is no answer after some time.
Posted on 27 February, 16:00 CET (15:00 UTC).
Have fun and good luck!