Deep in an arid desert region of Mexico lies a little known area that seemingly defies the physics of sound. Known as the Zone of Silence, locally as the Vertice de Trino, it is a place where radio waves barely permeate the air.
Located between the states of Chihuaua, Coahuila and Durango and only 400 miles from the U.S. Border, something in the area makes it almost impossible to receive radio, television, cell phones or any other sound related transmissions.
While the exact cause of this phenomenon has not been fully explained to date, there are many theories abounding that the area has been heavily influenced by past extra-terrestrial and other paranormal activities. Regardless of the cause, the Zone of Silence continues to be a fascinating study into the unknown.
The unique qualities of the region were first discovered when Mexican aviator Francisco Sarabia reported radio trouble while flying over the area in the 1930s. This phenomenon was then later confirmed in 1966 when an organic chemist could not contact fellow team workers on his hand-held radio while conducting a field study.
However, full awareness of the unique sound anomalies within the zone did not arise until July 11, 1970. On that date, a faulty U.S. Air Force rocket launched from the White Sands Missile Base in New Mexico went suddenly off course and crashed into the remote desert region.
Because the rocket was carrying two containers of radioactive elements, an Air Force recovery team was immediately dispatched to the area where it was once again confirmed that all types of radio signals failed to travel through the air. As a result, research headed by the Mexican government was established to study the unique plant, animal and mineral components of the area in an effort to determine the cause of the drop in signals.
The most commonly held position among scientists for the sudden disappearance of radio waves is the high amounts of mineral deposits in the region. Very high levels of both magnetite and uranium are present, which could create enough electromagnetic pulses to interfere with radio signals. In addition, the region has also received an unusually high level of meteorite activity over thousands of years. This has given rise to speculations that there may be some unusual magnetic properties in the soil arising from the breakdown of meteorite fragments.
The high level of meteorite activity has generated many theories that the region is a vortex where an extraordinary amount of earth energy is concentrated, leading it to be a hot spot for paranormal activities.
Numerous reports by local residents of UFO sightings and contact with extra-terrestrial beings have been documented on a regular basis since 1910. Some people have claimed to be witness to large disks landing on area hills, while many others describe a regular occurrence of mysterious lights and fireballs in the night skies.