1. Formerly NTNU – Norwegian University of Science and Technology, Acoustics Group, Department of Electronic Systems, Trondheim, Norway; formerly NTNU – Norwegian University of Science and Technology, Centre for Geophysical Forecasting, Trondheim, Norway and presently PTT Exploration and Production Public Company Limited (PTTEP), Bangkok, Thailand. (corresponding author)
2. NTNU – Norwegian University of Science and Technology, Acoustics Group, Department of Electronic Systems, Trondheim, Norway and NTNU – Norwegian University of Science and Technology, Centre for Geophysical Forecasting, Trondheim, Norway.
3. ConocoPhillips Norge, Tanager, Norway.