Military training
Artillery, demolition and live-fire training carries a long way across open ground, especially from the Yakima Training Center to the west.
How to tell
- Repeats in a rhythm rather than happening once
- Low, rolling thud you feel more than hear
- Often several over an hour, then nothing for weeks
- Windows rattle but nothing nearby is disturbed
When it usually happens
Usually weekday daytime and early evening, in clusters over consecutive days.
Heard one just now?
Report it and we will tell you what it most likely was. More reports from different directions make it far easier to pin down.
Report what you heard