Status history

caltech.edu

Last 24 hours · captured from our 4-method probe.

Uptime0%Checks 24h2Avg latency135msDown events2

up down degraded unknown 2026-07-26 08:11 UTC → 2026-07-26 08:23 UTC

No status changes in the window, steady state.

2026-07-26 08:23 UTC HTTP/1.1 · strict TLS 153ms · UNABLE_TO_VERIFY_LEAF_SIGNATURE
2026-07-26 08:23 UTC GET · browser UA 131ms · UNABLE_TO_VERIFY_LEAF_SIGNATURE
2026-07-26 08:23 UTC HEAD · curl UA 130ms · UNABLE_TO_VERIFY_LEAF_SIGNATURE
2026-07-26 08:11 UTC HTTP/1.1 · strict TLS 127ms · UNABLE_TO_VERIFY_LEAF_SIGNATURE
2026-07-26 08:11 UTC GET · browser UA 130ms · UNABLE_TO_VERIFY_LEAF_SIGNATURE
2026-07-26 08:11 UTC HEAD · curl UA 139ms · UNABLE_TO_VERIFY_LEAF_SIGNATURE