... the earthquake occured and people have a deep sleep at night., quake alarm Earthquake detector alarm PFS-058, quake ... When it happened in horizontal, the earthquake alarm can react right now, but, if it ... can react the vertical alarm, we can set it in magnitude and if you don't need ... iron-sheet house Magnitude 4: wooden house, townhouse, and brick bungalow Magnitude 5: mansion *World patentUS patent ...