There was another earthquake along the Panama fracture zone today, following a couple from earlier in the month. Today, there was a Mb 5.1, while on 1.16/2015 there was a Mw 6.6. There was a swarm along strike with the PFZ in May of 2014.
This map shows the earthquakes from May of 2014.
Also, here is a short explanation (from the USGS) of the graphical solutions for focal mechanisms. While moment tensors (shown in my interpretation figure above) and focal mechanisms are determined differently, their graphic representation of the deformation from earthquakes is the same.
- Abratis, M. and Wörner, G., 2001. Ridge collision, slab-window formation, and the flux of Pacific asthenosphere into the Caribbean realm, Geology, v. 29, no. 2, p. 127-130.
- Coates, A.G., Vollins,L.S., Aubry, M-P., and Berggren, W.A., 2004. The Geology ofthe Darien, Panama, and the late Miocene-Pliocene collision ofthe Panama arc with northwestern South America, GSA Bulletin, v. 116, no. 11/12, p. 1,327-1,344.
- Morell, K.D., Gardner, T.W., Fisher, D.M., Idleman, B., and Zellner, H., 2013. Active thrusting, landscape evolution, and late Pleistocene sector collapse of Baru Volcano above the Cocos-Nazca slab tear, southern Central America, GSA Bulletin, v. 125, no. 7/8, p. 1,301-1,318.