Thursday, 20 June 2019

Pacific Ring Of Fire, Southern California and Yellowstone all have experts a little jumpy this month as “swarmageddon” hits downtown Los Angeles

MAP USGS
A swarm of nearly 3,000 earthquakes have hit California in the last 30 days according to USGS, leaving experts asking, how nervous should we be?

According to the LA Times, the seismic storm that unleashed more than 1,000 small earthquakes in San Bernardino and Riverside counties these last three weeks elicited what has become a typical reaction in quake country.
 To some, the “swarmageddon” 40 miles east of downtown Los Angeles brought fear that a bigger threat was coming.
To others, as long as they didn’t feel a shake, it was easy to just put it out of their minds.
California has small quakes all the time — a magnitude 3 every other day, on average.
But not all of them act the same, and some bring more danger than others.
As officials install more seismic sensors as part of the state’s early warning system, experts are getting an increasingly better look at California’s smaller earthquakes.
According to The Daily Mail, It’s reminiscent of activity near the San Andreas Fault three years ago that had some scientists on edge for a possible large triggered earthquake.
While that never happened, a spike in small earthquakes can raise the chances of a bigger event, albeit only slightly. Scientists say people living in the earthquake-prone state.

Meanwhile, the Daily Express claimed earlier today, a magnitude 3.1 earthquake was recorded in Manhattan, Montana, just 100 miles from the Yellowstone caldera.
Though the tremors were small, they will still be of interest to scientists due to the high possibility of a swarm, which can see hundreds of small earthquakes in a short period of time.
USGS’s website explains: “Since 1973, there have been over 48,000 earthquakes located in the Yellowstone region.
The Yellowstone Caldera is a supervolcano located below Yellowstone National Park in the Western US.
It sits between the states of Wyoming, Montana and Idaho and is constantly monitored by the United States Geological Survey (USGS) due to its capability to inflict disaster on a global scale if a supereruption occurs.
The last event of this kind has not happened for more than 630,000 years and any serious eruption in 70,000 – which reportedly makes another supereruption overdue.

Meanwhile, the Pacific Ring Of Fire has been very busy in the last 7 days recording 8 major quakes, (mag 6 or higher) with the biggest being a massive mag 7.2 NE of L'Esperance Rock, New Zealand
A total of 9 major quakes have occurred in June so far with all of them recorded along the Pacific Ring Of Fire.
67 major quakes have been recorded so far in 2019, with only 8 of them outside the Pacific Ring Of Fire.

Major Quakes

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10 comments:

  1. I'd have thought a swarm of small 'quakes such as experienced was at least indicative of pressure being regularly relieved within the system, rather than have nothing for months and then one big bang; AND WE ALL FALL DOWN....

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    1. Right? Rather like holding in small farts till there is a Problem!

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  2. A spike in small earthquakes can raise the chances of a bigger event, albeit only slightly

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  3. More importantly, what is the deviation from the norm? For example, according to NOAA, quakes measuring 8.5 or more come in swarms. From 1900 to 2000 there were 10 (7 in a 16-year period between 1950 and 1965). From 2001 to present there have already been 6 (8.5; 8.6; 8.6; 8.8; 9.0; 9.1). And between the 1965 Alaska earthquake to the Indonesia 2004 earthquake, there were ZERO. We're in a swarm right now!

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  4. I think everyone is looking at the wrong end of the problem. Yes there have been large swarms of smaller earthquakes, which do not relieve much stress. Note that the Richter scale is ​logarithmic ​and that a 4.0 rating is 10 TIMES the strength and pressure relief as a 3.0 quake. Looking at the USGS earthquake maps for the last 6 weeks--there have been ZERO earthquakes of more than 4.5 size in the continental US and Canada. This means that if you believe that the plates pushing against each other cause pressure and stress to build up which are relieved by earthquakes--then there is a lot of unrelieved pressure there. I am a 75 year old geology, earthquake and volcano junky that has been watching the USGS earthquake site almost since the day it went online and I have never seen anything like this.

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    1. Thank you for your knowledge. I find it very interesting, as well as (above) slightly scary! Not only is it above slightly scary for what it means, but also for the lack of concern an astounding number of people have regarding it!!! I have absolutely no idea if global warming is a factor here, but I can't help but think that fracking does. No matter if it's happening in the general vicinity of the quakes or not, I believe it has to have a ripple effect through the layers over time. If so, would it not be a cause for the plates to shift and continue to weaken the subterranean levels moving outward? I don't know, I may be coming off as stupid with all of this, but it makes some sense to me!

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    2. Remember the USGS is notorious for lying and ommitting important info. You can't trust them. Watch Dutchsinse for truth.

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  5. Thanks for the intelligent input, people.

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  6. oh yes.... US B S note that there are NO earthquakes in Oregon.
    Multiple earthquakes in AK, down thru WA, screeeeech, put on the brakes... no EQs in OR
    down to CA border, miraculously they begin again.
    USBS withholding EQ info!
    I live in OR and have FELT quakes over the last few months.

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  7. Relax, there's nothing you can do except have fun, hold on, and enjoy the ride. Mother Nature always wins!

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