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Saw an unexpected spike this night
Saw an unexpected spike this night
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3 weeks 10 hours ago #7438
by Mercator
Normally my measurements are around 15 CPM. My running average is always around that number as well. But last night between 01:30 and 03:30 CET I saw a spike in the running average up to 22 CPM. That doesn’t seem like much, but my station is very stable throughout the year, so it stood out to me. I believe I also noticed an increase during the night at other stations in the Netherlands. According to the Windy app, at that time the wind was coming from the south (via France and Belgium).Has anybody else seen anything similar this night
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2 weeks 21 hours ago - 2 weeks 21 hours ago #7441
by nrk94
Hello, I'm not a member of the community but have some questions about this event as well and don't know where to ask otherwise.
I've read that there were reports of extreme radiation levels in Germany the days before: https://www.reddit.com/r/Radiation/comments/1nwir9d/comment/nhgg0py/?context=3&share_id=cbrhLVzwzps4hKogYw4lN&utm_medium=ios_app&utm_name=ioscss&utm_source=share&utm_term=1
The German Federal Office for Radiation Protection afterwards posted that the system reported false positives due to an internal exercise and corrected the values: https://de.linkedin.com/posts/bundesamt-fuer-strahlenschutz-bfs-_integriertes-mess-und-informationssystem-activity-7379873844192309248-1osV?utm_source=li_share&utm_content=feedcontent&utm_medium=g_mb_web&utm_campaign=copy
What I think is very odd that many (if not all) graphs on radmon.org are missing the measurements for this time period as well - as can be seen in your graph. Does anybody why this is the case? Can anybody state whether the radiation levels were higher than usual during that time?
If so, that would probably explain the recent spike you experienced, but raise many further questions.
Greetings from Germany!
Last edit: 2 weeks 21 hours ago by
nrk94.
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1 week 6 days ago #7442
by Simomax
It looks like radmon.org was down/offline just after 2025-10-03 06:19:01 and came back online just before 2025-10-03 15:12:06. This was most likely a power outage as Dan has had a few of these over the past year.
Looking at the reddit OP, that was posted 2025-10-02 23:55:51, so six hours before radmon.org went offline. If the radiation was real, it would most likely be caught on detectors downwind from the 'release' some hours before radmon.org went offline, and maybe some hours after it came back online. Reading the reports they all say the same - the data was wrongly released during an exercise - I have no reason to believe otherwise.
It's just a coincidence that radmon.org went down ~6.4 hours after the reddit OP, and I don't think explains Mercator's spike. Also Mercator states that at the time of their spike the wind was coming from the south. In the reddit OP, it clearly shows the wind coming from the north (as the radiation is drifting southwards.)
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1 week 6 days ago - 1 week 6 days ago #7444
by Mercator
I am not pointing out to the outage. That happens. I am pointing out to the period thereafter. The outage ends arount 14:xx . (your time)
The event I saw was around 01:00 CET the other day. It is visible in my graph but also in the radmon graph. look in the attached graph from my site. The peak is around 01:52 CET
Last edit: 1 week 6 days ago by
Mercator.
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1 week 6 days ago #7445
by Simomax
I was referring to nrk94's comment, not your post, Mercator.
What I think is very odd that many (if not all) graphs on radmon.org are missing the measurements for this time period as well - as can be seen in your graph.
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1 week 6 days ago #7446
by nrk94
Sorry for making this a bit off topic - Sinomax, are you sure with your time estimates? The screenshot on reddit is from 2nd October, 21:00 UTC, which is 23:00 current european time.
The data logs on radmon show a last measurement around 23:19 and pause until 06:10 the next day, if I'm not mistaken. It seemed to line up almost perfectly with the sudden spike seen on Windy, therefore my confusion.
I checked some readings on gmcmap.com and they seem normal for the period in question. Unfortunately there don't seem to be any stations on radmon in the vicinity of Rostock (of the simulated incident) to check the last measurements.
Hopefully a bit back to the original topic: This user in Denmark seems to have logged a similar spike to Mercator if I'm not mistaken: https://radmon.org/radmon.php?function=showuserpage&user=stenit
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Saw an unexpected spike this night
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