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Leak SiteState AGConfirmed6 filings · 5 statesLifecycle stage 2 of 3: ConfirmedUnverified claimConfirmedEnforcedcactushigh sensitivity
Merged incident · 6 filings

American Meteorological Society, Inc. — April 2023 breach

Clustered 6 filings across 6 jurisdictions · filing window Jul 20, 2023 → Dec 15, 2023. View entity profile → Other incidents for this victim →

⚠ 2 cross-filing discrepancies →Merge100%

Determination

Confirmed

Members

6 filings

States

5

Affected · reported

557

First → last filing

Jul 20, 2023 → Dec 15, 2023

Merge confidence

100%

incident inc_15aa0eed7a1740a3 · merged by deterministic · confidence 100%

Confirmed breach. Merged as one breach: 5 regulatory filings and 1 unverified claim. The filings describe unauthorized access. Intrusion Apr 1, 2023–Aug 9, 2023, discovered Apr 1, 2023 — the first regulatory filing landed 257 days later (flagged late). 557 individuals reported across the linked filings. Data reported: Government ID, Financial account, PII, and 1 more. Notifications rolled out on a 148-day schedule across 5 filings beginning Jul 20, 2023. Each member filing remains the legal record for its jurisdiction.

Litigation Timing

Notification delay
257days

Discovered → first regulatory filing

Discovery variance
248days

Range of discovered_at dates across filings

Leak precedence
147days before filing

Days between the first leak-site claim and the first regulatory filing. Positive = the claim came first (public exposure before disclosure). Negative = the claim trailed the filing, so there was no pre-disclosure leak. Counts regulatory filings only — press coverage is not a regulatory disclosure.

Filing span
148days

Time between earliest and latest filing

Not recorded for this incident

Materiality delta · SEC filing delay — no SEC 8-K in this cluster.

Regulatory clocksVermont✗ VT AG >45 bdayMaine✗ ME AG >90d · 128dLeak gap⏱ Leak >90dFull clock table in Litigation Timeline

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American Meteorological Society, Inc. data breach (2023) · DisclosureLens