Oh, this is some interesting stuff especially for the earthquake prone areas. Last earthquake shook my entire house at midnight, thankfully, it wasn't all that intense and no damage was done. Here is something interesting; they call it a Gragraph home seismograph (I really don't care much about the name, till it saves my life).
It acts as a basic seismic data at home, keeps records of the earthquake, and also increases safety. Its calendar function stores previous events and times for your reference as well. So don't wait for the next blunder to happen and make sure you get one of these home. Gragraph home seismograph's alarm is the most alarming feature in dire situations, it emits a sound that grabs your attention, and your are set to avoid the peril.