Table 12.

Possible detection and verification scenarios at a sensor node.

Possible Detection and Verification Scenarios	Output
First received an unverified alert, and afterwards, EQ was detected.	Verified alert
First detected an EQ and afterwards received an unverified alert.	Verified alert
First received an unverified alert and afterwards received a second unverified alert from a different sensor.	Verified alert
First received an unverified alert, and after waiting for a predefined time window, no further receipt of unverified alerts or detection of EQ (false EQ detection).	No alert
First detected an EQ and afterwards received a verified alert (missed EQ detection).	No alert
Verified alert received before arrival of an EQ.	EQ warning