TIMELINE OF EVENTS (RESTRICTED): 04:12:09Z – First anomaly detected: encrypted chime residing in TCP/IP packet headers, generating synchronization failures at NORAD, seven regional academic servers, and an unregistered mailbox at The Well. 04:15:43Z – Unilateral shutdown initiated on 47 machines after emergence of message subject headings: 'MIDNIGHT ECHO / WEATHER RED'. 04:27:11Z – Technicians (7/7) at NSA field site report identical auditory phenomena (time-locked phrases: 'Sleep before signal.'). 04:37:22Z – Inter-continental digital echo registered on mirrored traffic in Sweden, Taiwan, and Penticton, Canada (see Attachment L4). 05:03:55Z – USENET posts on comp.sys.invisible vanish mid-transmission. Immediate quarantines deployed.
ANOMALOUS CONTENT RECOVERY: Recovered packets contained encoded hex resembling Morse code fragments that, when decoded, read: 'RETURN E-CHIME TO ORIGIN'. Internal review determined no operational protocol for E-CHIME existed prior to this event. Note: Attempts to reply via encoded channel returned 'ERROR: RECURSION IN THE KEY LOGGER,' halting further attempts.
EFFECTS ON SYSTEMS (UNPRECEDENTED PROTOCOL FAILURES): Affected systems suffered persistent memory anomalies: calendar auto-population with impossible dates (February 31; April 0), and spontaneous midnight reboot cycles ending with CRT flicker displaying the phrase 'NO WEATHER TODAY'. Early network logs now show zeroed checksum fields where E-CHIME was present.
POST-EVENT ANALYSIS, SEQUESTRATION: Subsequent forensic audit failed to replicate the signal, even by employing original hardware and simulated packet arrangements. In isolated cases, system engineers exposed to direct E-CHIME contact reported chronic insomnia and signature auditory aftereffects for 11–13 months post-incident. Operation MIDNIGHT ECHO officially redacted from security memos by January 1998.