Method of determining earthquake by time series intersection of a plurality of seismographs

An earthquake detection method, comprising the following steps:

• receiving a first signal and at least a second signal, wherein the first signal is triggered in response to a first vibration state of a main detection site, and the at least a second signal is triggered in response to at least a second vibration state of at least a backup detection site;
• determining whether a quantity of those being enabled among the at least a second signal satisfies a quantity condition, and determining whether the first signal and the at least a second signal are both enabled at a specific time point, wherein the first signal and the at least a second signal respectively have a first and at least a second initial enabled time points;
• and
• determining there is a real earthquake event when an interval between the first and the at least a second signal satisfies a time relationship,
• wherein the time relationship is that the interval between the first initial enabled time point and the at least a second initial enabled time point is within a specific time length;
• and
• wherein the at least a second signal has a first enabled quantity and a second disabled quantity, and the quantity condition is a condition that the first enabled quantity is larger than or equal to the second disabled quantity.