Seismic sensor and accelerometer

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Seismic sensors and accelerometers both detect vibrations, but they serve different purposes. Seismic sensors specifically monitor Earth vibrations, often utilizing specialized accelerometers, while accelerometers can be designed for various applications, such as airbag deployment. Additionally, seismic sensors may employ different principles beyond those of standard accelerometers. Historical records indicate that the earliest seismic sensors were acoustic devices developed around 400 BC for detecting intruders. Understanding these distinctions is crucial for selecting the appropriate technology for vibration sensing needs.
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Both Seismic sensors and accelerometers are used for sensing vibration. Then what is the difference between them?
 
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The goal of a seismic sensor is to monitor Earth vibrations. It can be based on an accelerometer specifically designed for this application. But accelerometers can be designed for other applications, such as airbag sensing. In this case, they are not seismic sensors. Also, principles different than accelerometers may be used for developing seismic sensors.
 
The first seismic sensors that I'm aware of were acoustic. It was mentioned in a Chinese document from somewhere around 400 BC, and was designed to detect intruders.
 

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