Overview
- The LIGO‑Virgo‑KAGRA Collaboration published peer‑reviewed results in Physical Review Letters from the event designated GW250114.
- Recorded on January 14, 2025, the merger of two roughly 32‑solar‑mass black holes about 1.3 billion light‑years away produced the network’s clearest signal with a signal‑to‑noise ratio near 80.
- The brief ringdown phase revealed multiple overtones whose frequencies and damping align with the Kerr metric, indicating black holes are fully described by mass and spin.
- Horizon‑area measurements show an increase from about 240,000 km² before the merger to roughly 400,000 km² after, providing high‑confidence confirmation of Hawking’s area theorem.
- The remnant is inferred to be around 63 solar masses rotating at roughly 100 times per second, with the result bolstering momentum for future facilities such as LIGO‑India, the Einstein Telescope and Cosmic Explorer.