For the ‘save for later’ file: 8 months after the 1939 Tropical Storm landfall there was a 7.1 earthquake on the Imperial Fault zone. I’m not going to get into an argument about the two being related or not, just documenting for the historical record for the inevitable next stage.
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USGS Aftershock Forecast Page: M 5.1 - 7 km SE of Ojai, CA (usgs.gov)
I’m not really engaged in social media much…I don’t know what to say about values in the smear zone. Rough going for PIOs. This is what USGS says about it.
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A followup on that from temblor.net. Sorta dense for me, but here it is:
The data recorded by the KOXR weather station at the Oxnard Airport, 23 kilometers (15 miles) away from the epicenter of the magnitude-5.1 Ojai earthquake, reveal a 1.5-kilopascal atmospheric pressure drop during Hurricane Hilary’s passage in Southern California (Figure 1a), slightly below standard tidal stress variations. The resulting stress perturbations would be even smaller if we resolved them along the fault plane at 4 to 5 kilometers (2.5 to 3.1 miles) depth, where the magnitude-5.1 earthquake nucleated. The pressure drop started about one day prior to the earthquake, and the pressure reached its minimum about three hours after the earthquake. This 1.5-kilopascal atmospheric pressure drop from Hilary is much smaller than the 6-kilopascal atmospheric pressure drop from a typhoon that struck Taiwan in 2009 — Typhoon Morakot (Zhai et al., 2021).
Southern California Earthquake Was Unlikely Triggered by Hurricane Hilary - Temblor.net
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Well… this is not really the topic for here, but I would not argue that the atmospheric pressure really matters but the change in electromagnetic charge of the ground through natural or artificial processes is what does.
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Space weather has a large impatct on our comms and GPS. Little off the discussion here but, fire folks need to pay attention to this. Why so is that generally creates nulls on 2 meter and we can have propagation that goes much further(meaning you can’t talk to someone accross canyon you can see if you are on a TAC((simplex)) ). It would be easy to tell if folks that are not on your incident (TAC) are talking, please take a standby if possible.
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I didn’t even read the whole thing, but I thought you’d appreciate it. I’d be inclined to agree that atmospheric pressure couldn’t tell the whole story, nor electomagnetism at large. What could geologic history tell you about a specific volume? Uniform layering is probably the exception, rather than the rule. One would need an accurate, detailed and timely 3D model to see what density what is where, at what angle, at what shape. What’s leaning on what? Is your volume enough to count the factors that matter? On and on. Like weather forecasting, right? You see the trend, but not the little eddys that are quite large in relative effect and irregular at scale.
USGS is most likely the best we got.
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Well now if we’re going deep might as well throw in “isostatic response” as a trigger or player in the earthquake game. At times it must surely play some role in the shaking of the earth and there isn’t much chatter about it either… https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2006GL027081
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Thank you for this. It makes a lot of sense that intercontinental seismic activity could be affected by warm and cold cycles as ground water increases or decreases and the weight of a landmass shifts. . People seem to misremember that the ground is charged and the groundwater and the manifestation of weather is related to the charge of the ground in relation to the charge of the atmosphere and ocean. So in this way you can modify the charge of particles in a desired way to create a desired outcome other than natural processes…. but in the context of the time period we are in it is important to understand the ever evolving nature of reality.
We tend to misunderstand cyclones as windy swirls but they are in actuality charged electro magnetic vortexes… so my thought is that it’s not the minimum central pressure that mattered but the unusual charge of the warm core tropical origin cyclone that helped trigger a seismic response by radical difference in the charge of the ground/groundwater in relation to the charge of the atmosphere.
It’s important to consider every, and I mean every factor that is currently occurring in this time period right now with 5th generation wf occurring, but again we should leave these topics for other forums.
I will throw in my thought on the sea surface temperatures and California tropical cyclones… it will probably be a lot easier to have tropical cyclone impacts in Baja and Southern CA (in the short term) as magnetic north continues drifting 37-50 miles towards Siberia a year and the overall field continues to weaken 9% a year. This is because the salt water is heavily charged and this causes the ocean currents to want to follow magnetic north, so it will become possible that the ocean heat transfer process continues to weaken leading to a weaker California cold water current with less atmospheric subsidence as a result… so perhaps the 26 degree isotherm drifts the same 37 miles north a year during the peak sea surface temperatures…. Which doesn’t sound like much, but expanding the available area for cyclones to strengthen and less time to weaken before heading north is a big deal. Additionally, the weakened magnetic properties leads to bigger heat transfer processes poleward when it finally does occur and thus bigger in size and stronger storms that have a higher intensity when reaching us.
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After reading the reply (more than one time btw) it literally felt like my brain experienced sudden rapid decompression from a blaster bolt! Scary part = i’m an idiot and i kinda get what you & others are pointing out here… Once again feeling like our elder smart people have been constrained by models/boxes that are not as solid, static, or uniformitarian as we are made to believe. Its all 100% frightening and cool af at the same time. Agreed on finding a different place/forum to cuss & discuss all the above. Meanwhile, #LearnToSwim #ArizonaBay \m/
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