Reference for magnetic anomaly identifications is:

Doo, W. B., Hsu, S. K., Yeh, Y. C., Tsai, C. H., & Chang, C. M. (2014). Age and tectonic evolution of the northwest corner of the West Philippine Basin. Marine Geophysical Research, 1-13.

Digitised by EarthByte from the Doo et al. (2014) paper.