In the 1950s , the Koor river basin was explored by the Dutch . The area was affected by a very large earthquake doublet in early 2009 , with recorded moment magnitudes of 7.6 and 7.4 , that had their epicentre near the town of Waibeem to the east of Koor . The earthquakes prompted a widespread tsunami alert in the Pacific region
earthquake doublet in early 2009
2009 Papua earthquakes
Koor, Indonesia