A few days ago I was talking about tectonic plates that USGS has arranged to visualize in a simple kml of 107 k, and in this it is necessary to recognize that Google Earth has changed our life for what it is possible to see with the simple intuition of those who are not experts in the matter.
This layer of earthquakes allows you to view information about earthquakes now used by the media to give less confusing information.
This is the case of the earthquake happened in Honduras this 28 of May of 2009, to the north of the island of Roatán; the circle marked in white indicates the 100 kilometers around where it is expected to cause serious damage an earthquake of less than 7 degrees on the Richter scale.
While all this fault known as the Motagua, which crosses Guatemala and separates the plates of the Caribbean and the North American is tear, on the map all that section is sectioned into small segments where the impact of the shock is different. For example, the line marked in yellow is the continental shelf, followed by a section marked in red and then the green line corresponding to the oceanic platform. These tearing failures are caused by the expansion of the seabed and its result in millions of years are the submarine ridges of volcanic origin; Observe how the islands of the bay are a consequence of this phenomenon and are parallel to the fault.
Although Honduras suffered an 7.4 earthquake (according to USGS), 10 have not yet been quantified dead after two days, because the epicenter was on the ocean platform (at 10 kilometers deep), had it been on the continental shelf, been serious because the damage of tearing failures is that its epicenter is usually close to the surface. Earthquakes of similar magnitude have left fatal results as is the case of Nicaragua (6.2 degrees, 5 kilometers of depth, 10,000 dead) or El Salvador (7.7 degrees, 39 kilometers of depth, 1,259 dead); They have been in the subduction zone and closer to large urban centers.
See that you can also see the replicas that happened yesterday:
- In the same fault, 4.8 same day
- Closer to the coast of 4.5
- Near Olanchito, 4.6, this is on mainland.
By selecting the point of the epicenter you can see other features such as the intensity map, which shows in colors the places where there was more movement on the mainland. Too bad that in this USGS maintains a map with a lag, of about 7,000 meters but if you were to hunt down exactly you would see the areas marked in orange that fall on the border of the departments of Yoro and Cortés, which incidentally are separated by the Ulúa River where the bridge of El Progreso collapsed.
Definitely, Internet and Google Earth has changed the way of seeing the world, for that matter, you can already see in the Wikipedia section dedicated to 2009 earthquakes, Although for other purposes We crucified to both.