Assuming the data are accurate (e.g. we are no more able to record quakes today than we were 100 years ago due to tech improvements), then that would seem to be the case. It would be interesting to show a map of only 5-6 quakes overlaid on a map of fraking locations.
Earthquakes can be sensed from basically anywhere, only the time it takes the P/S waves to travel to you are different, especially if the quake is M>5.
More sensors don’t really add more detections, but are useful for pinpointing an origin.
The chart cites Wikipedia as the source. Maybe it’s just that earthquake after ~2000 tend to have a significant higher chance to be logged on Wikipedia compared to before?
Wikipedia launched around 2001, so it would fit in that timeframe.
Yeah, there's something very suspect about this data.
Just off the top of my head, I'm quite sure there were more than 3 earthquakes with magnitude between 5.0 and 6.0 for the 80 year span between 1900 and 1980.
Also, there's a notable discontinuity of exactly magnitude 7.0 earthquakes starting at the year 2000 that doesn't look like raw data.
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[ 3.7 ms ] story [ 44.9 ms ] thread> Modern recording equipment has been in use since about 1900.
What is the difference in sensitivity between a seismometer made in ~1900 vs 2023?
More sensors don’t really add more detections, but are useful for pinpointing an origin.
Here's a quick rundown: https://slcc.pressbooks.pub/physicalgeography/chapter/4-3/
Just off the top of my head, I'm quite sure there were more than 3 earthquakes with magnitude between 5.0 and 6.0 for the 80 year span between 1900 and 1980.
Also, there's a notable discontinuity of exactly magnitude 7.0 earthquakes starting at the year 2000 that doesn't look like raw data.