Download Catalogue  (French)

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The most important countermeasure against earthquake risk is to have all structures strong enough for the possible earthquake load. In this regard, an early warning system should be installed to reduce the possibility of earthquake disaster. An early warning system is required mainly to issue an alarm to have a time margin for evacuating or shutting down key facilities, and not to determine exact earthquake parameters.

There are two kinds of Earthquake Early Warning System (EWS)  One is On-Site Alarmwhich is the sensors based  at the site of the objects to be warned.

The other is Front Alarm which is the alarm based on the observation near the epicentral area for the warning to possible damaged area. “Front Alarm” is transmitted by using communication networks, so the alarm is also called as “Network Alarm”.


Our DX systems are On-Site Alarm systems our DX earthquake detectors do not predict earthquakes.

OUR DX EARTHQUAKE DETECTORS  DETECT THE FIRST WAVE OF AN EARTHQUAKE THAT IS HARMLESS “as opposed to predicting it”

AND ALERT BEFORE THE OTHER DESTRUCTIVE WAVES CREATE THEIR EFFECTS.

Institutions responsible for the safety of the citizens of California are trying to introduce this type of technology in California. Click HERE for more details.


How it works:

A seism, in Greek seismos, from seiein to shake, is a less common name for earthquake, and is translated in surface by vibrations of the soil. The point of origin of a seism is called the epicentrum, or the seismic home. It can be between the surface and up to seven hundred kilometers deep for the deepest events. It is a sudden, transient motion or trembling of the earth’s crust, resulting from the waves in the earth caused by faulting of the rocks or by volcanic activity.

Three big categories of waves can be generated when there is an earthquake.

The waves P or waves of compression: They are the first to arrive, are inoffensive, and often unobvious. Waves P are the quickest (6 km / s near the surface). These are the first waves recorded on a seismogram.

The waves S or waves of shearing: The vibrations are made perpendicularly, in other words, they spread, as if it was a vibration from the rope of guitar. They are slower than waves P, but are destructive, and appear secondly on a seismogram.

For the waves R commonly known as waves of Rayleigh: The progressions of the waves are at the same time horizontal and vertical. They are guided by the surface of the earth, and they spread less quickly than waves P and S, but have in general stronger amplitude. These are the waves that produce the most destructive earthquakes

Once the wave P is detected the earthquake detector will trigger an alarm leaving the time to evacuate tens of seconds before the big shock ( S or R waves)

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