EARTHQUAKE ALARM - EARTHQUAKE DETECTOR QUAKE ALARM

The Quake Alarm™ alerts you to an earthquake before it starts shaking in your area buying you time that can save lives. It can provide a few seconds warning up to as much as 30 seconds depending on how far from the epicentre you are, enough time to move away from fall hazards and to a protected area.

Christchurch Field Test Reports

Date: June 6, 2011 through to December 2011
Time: Multiple
Location: Multiple
Magnitude: 2.0 - 5.5
Location of Quake Alarm: Kaiapoi, Christchurch

Report: Since being installed in Christchurch there have been many earthquakes/after shocks ranging from magnitude 2.0 to 5.5. The observers have reported that the Quake Alarm has detected all earthquakes/aftershocks above magnitude 3.5 (and some as low as 3.0 depending upon depth and distance from the Quake Alarm), giving a few seconds warning in each case and continuing to sound for the duration of the earthquake. The Quake Alarm has been found to be particularly important at night waking everybody up quickly and saving time from the advanced warning, the instant confirmation that a quake is occurring and the rapid awakening that the sound of the alarm provides. No false alarms have been detected.

How Does It Work?

When an earthquake occurs, it releases energy in the form of seismic waves that radiate from the earthquake source in all directions. The fastest wave is called the P wave. The P wave alternately compresses and expands material in the same direction it is traveling. The destructive S wave is slower than the P wave and arrives next, shaking the ground up and down and back and forth perpendicular to the direction it is traveling. The Quake Alarm™ is sensitive enough to detect the P waves and sound the alarm before the destructive S waves hit.

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