Current Central American seismic activity
Pursuant to Guil's excellent post about the Managua Fault ...
In the last week we have seen earthquakes hit Haiti, the Cayman Islands and the Pacific coast of Guatemala. As indicated in the map link below, all three of these locations are connected directly, point-to-point-to-point, along a series of faults lines and spreading ridges that separate the Caribbean / Central American Plate and the North American Plate.
So, it would appear to me that there is increasing seismic instability along this fault line.
Note also from the map that this boundary line intersects a North-South fault line called the Coco Ridge under the Pacific off the west coast of Central America, from Mexico through Nicaragua to Panama. The intersection point appears to be close to the epicentre of this week's event in Guatemala. The Coco Ridge separates a tectonic plate in the Pacific from the Caribbean / Central American Plate. The Managua Fault is a side-effect of this subduction zone.
Without in any way trying to draw a Doomsday scenario, from this I infer that we may (MAY!) be entering a period of increasing seismic disturbances in Central America. If so, Nicaragua is at increased risk of earthquakes, temblors, tsunamis and volcanic activity.
To find out if you live in a zone that might be affected by seismic activity, the link below will take you to the pdf of a study of seismic risk in Nicaragua. It was produced in 1983 on behalf of the Nica government and contains a map of seismic risk done in 1975 in Stanford.
If you not in an earthquake zone, do not think that you are not at risk. Ash deposits from the Pacific volcano ridge could be carried inland by prevailing easterlies, and tsunamis could cause flooding up river valleys deep into the interior.
Apropos of perhaps nothing, the paradigm underlying all of this, that is, the theory of continental drift, was first developed by a geophysicist called J. Tuzo Wilson. As an undergrad I took a course on this subject from Wilson himself at Erindale College of the U of Toronto, and I also studied it in high school under the tutelage of his son. I specifically remember Wilson using a pointer to indicate the Caribbean Fault on a map he projected onto the lecture hall wall. Now here I am, more than 40 years later, being drawn once again to this subject matter.