A <a href="https://en.wikipedia.org/wiki/Vela_incident" id="mwyA" rel="mw:WikiLink" title="Vela incident">bright flash</a>, resembling the detonation of a nuclear weapon, is observed near the <a href="https://en.wikipedia.org/wiki/Prince_Edward_Islands" id="mwyQ" rel="mw:WikiLink" title="Prince Edward Islands">Prince Edward Islands</a>. Its cause is never determined.