Q. 2

With the help of

Answer :

The two most popular devices that can detect earthquakes and tsunamis are the Brinco and the Omron D7S Seismic Sensor.

a) Earthquake-savvy ‘smart sensors’ that can be installed directly on the machinery itself and can close-down production lines and other potentially hazardous equipment when seismic vibration is detected – such as the Omron D7S Seismic Sensor – have come onto the market. Launched earlier this year, the D7S can also help determine post-quake damage by mapping seismic intensity and providing information on risk of building collapse.

● The D7S sensor has algorithm technology that gives high-precision measurement of spectral intensity, allowing the sensor to reject impulse vibration noise and respond only to genuine seismic activity.

● They feature of the built environment such as bridges and flyovers that might take a hit from earthquake shocks. D7Ss are already used in Japanese buildings to monitor seismic activity and help prevent secondary disasters.

b) A new device that you can keep in your house can warn you when an earthquake or tsunami is detected in the local area. The Brinco - a small, round, flat, metallic cylinder - is a networked seismic warning and monitoring system with an accompanying mobile app. The Brinco connects to an international seismograph network and is able to provide users with voice, flashing light and alarm alerts when an earthquake or tsunami is detected in the local area.

● Brinco can provide five, ten, even 30 seconds or more notice of when an earthquake will hit your home or office. Tsunami warnings can arrive up to several hours in advance.

● When the network detects the initial first wave of an earthquake that is relatively non-destructive, the information is relayed to the Brinco and an alert delivered.

● From the initial detected wave, it is possible to calculate when the second, more destructive slow waves will hit and, thus, the warnings can be tailored.

● If only a slight tremor is detected, a yellow light is shown with the voice message, "Slight tremor expected in xx seconds. No damage expected."

● A dangerous quake triggers a red light accompanied by the voice message, "Earthquake expected in xx seconds. So either take cover or go outside now."

Each Brinco is also a seismograph. The devices collect seismic information for their location and send it to national and regional seismic networks around the world, as well as the Brinco network itself.

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