Operators

Takaaki Yokozawa, Hiroshi Takaba, Dan Chen

Shift Time

9:00–17:00 JST

Check Items

• VAC: No issues were found.
• CRY cooler: No issues were found.
• Compressor: No issues were found.
• OBS INTENT: The OBS INTENT was ON throughout the shift.

Note

• Around 11:00 JST, ground motion increased. It returned to normal around 14:00 JST.
• Around 12:00 JST, the network connection was lost. It recovered around 12:30 JST.
• The following earthquakes occurred near the Tokara Islands:
  • 14:51 JST – Magnitude 5.1
  • 14:59 JST – Magnitude 5.2
  • 15:07 JST – Magnitude 5.1
  • 15:26 JST – Magnitude 5.6