Abstract
During periods of background seismicity large variations in temperature occur due to crustal deformation. Earthquakes are preceded due to ground lengthening, tilting or shortening. A large amount of heat energy at the earth's core tries to find a path to come out from one way or the other. In this paper, we present an instrumentation system to study the variations in temperature that occur prior to an earthquake. The changes in the temperature and relative Humidity are sensed by using Smartec sensors SMT16030 and SMTHS07.The Smartec temperature sensor SMT16030 is a sophisticated active full silicon temperature sensor with a digital output. The capacitive humidity sensor SMTHS07of Smartec is based on silicon technology on glass wafer. The sensors are powered by using solar panel. The output of the sensor is directly connected to a zigbee transceiver module. The data is further transmitted wirelessly over a distance of 120 metres by using Zigbee transceivers. ZigBee is an open global standard built on the IEEE 802.15.4 MAC/PHY. The received data is recorded and analyzed using PIC18F4520 microcontroller and further transmitted on to the Internet through the GPRS network.
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