Explosion sounds near South Sister 9/1

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christabrews
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Joined: August 12th, 2018, 10:07 am

Explosion sounds near South Sister 9/1

Post by christabrews » September 5th, 2020, 8:29 pm

While camped on the PCT near South Sister on 9/1, I heard a series of explosions coming from up on the mountain. It was not gunfire. The explosions sounded timed, almost evenly spaced. Definitely not the time of year for avalanche control, I would think. Not much snow to be seen...
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johnspeth
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Re: Explosion sounds near South Sister 9/1

Post by johnspeth » September 6th, 2020, 5:59 am

Did you see any dust clouds drifting across the landscape nearby or in the distance? I'd expect that during the dry season.

Locating sounds in the mountains are tricky due to distance and reflections (echoes). I doubt that they came from within the wilderness boundary. My guess is it was related to road work somewhere.

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christabrews
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Re: Explosion sounds near South Sister 9/1

Post by christabrews » September 6th, 2020, 7:34 am

Hard to say, there was a lot of haze from the wildfires in California.

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oldandslow
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Re: Explosion sounds near South Sister 9/1

Post by oldandslow » September 6th, 2020, 11:15 am

The South Sister's bulging seems to have calmed down in recent years but you never know. If the bulging had anything to do with the explosions, it probably would have shown up on someone's seismograph.

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