Next Steps: The Evolution of Yahoo Groups (Final Notification)

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[Geology2] File - Rules

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Re: California Disasters Content Reposted on VolcanoMadness Blog

Your failure to respond to my inquiry will end your membership and continued California Disasters & Geology2 theft of content to your blog which appears to be driven by your desire to increase traffic to your blog without having to create your own content. You are not helping the reputation of Nigerians in the world. You need to examine yourself.

On Tue, Nov 19, 2019 at 1:07 AM Kim Noyes <kimnoyes@gmail.com> wrote:

I am curious as to why you have been auto-redirecting my California Disasters content onto your Blogger account entitled "Volcano Madness" for over a decade. You never asked permission and yet filled your blog with my content also without giving credit. Before I take action I would like to hear your side of the story first. I'm a reasonable man.

California Disasters co-Founder & Owner

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Kim Noyes about.me/kim.noyes

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[CaliforniaDisasters] California Disasters - Daily Summary

This is a daily summary for California Disasters. View all your groups.io groups, and edit your subscriptions, here. Do not reply to this email. To view and reply to a topic, click the subject. new topics: ● On This Date In California Weather History (November 19) By Kim Noyes ● The Case for Letting Malibu Burn By Kim Noyes ● Red Flag Warnings - NorCal (11/19/2019-AM) By Kim Noyes ● After the Tubbs Fire, homes in California town are being rebuilt without strong building codes #tubbsfire By Kim Noyes ● Teacher Helps Revive the Role of Fire Lookouts By Kim Noyes ● Newsom Signs Wildfire Liability Bill, Utility Customers to Pay $10.5 Billion Into New Fund By Kim Noyes ● Bankrupt PG&E increases offer to California wildfire victims. Here's the utility's new plan. By Kim Noyes ● North Ops News & Notes Update (11/19/2019-2:10PM) By Kim Noyes ● Radio traffic - The first 2 hours of the Camp Fire in Paradise [AUDIO] #campfire By Kim Noyes ● Day of Fire - Camp Fire Lessons Learned #campfire By Kim Noyes ● Flash Flood Warnings - SoCal (11/19/2019-PM) 2 By Kim Noyes ● 900,000 Californians Prepare for Another Blackout Wednesday By Kim Noyes ● Oz Fires on MODIS (11/19/2019-PM PST) [ATTACHMENTS] 2 By Kim Noyes ● Steps to Reduce the Risk of Wildfires in California By Kim Noyes ● Long-Term Wear Found on PG&E Line That Sparked Camp Fire [VIDEO] #campfire By Kim Noyes Home Subscription Messages New Topic   © 2019 Groups.io

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[CaliforniaDisasters] California Disasters - Daily Summary

This is a daily summary for California Disasters. View all your groups.io groups, and edit your subscriptions, here. Do not reply to this email. To view and reply to a topic, click the subject. new topics: ● On This Date In California Weather History (November 18) By Kim Noyes ● Protecting California Communities in the Age of Mega Fires [VIDEO] By Kim Noyes ● HAM radio operators seek greater role in emergencies By Kim Noyes ● Be Prepared: Fire Season May Just Be Getting Started in Northern California By Kim Noyes ● NSW bushfires burn through more land than any other blazes in past 25 years By Kim Noyes ● MAP: Bay Area counties to be affected by PG&E power shutoffs [INTERACTIVE MAP] By Kim Noyes ● The King Fire - A New Kind of Wildfire? [VIDEO] By Kim Noyes ● California, Sydney ... Bushfire And Climate Change Debate Rage By Kim Noyes ● PG&E officials say wildfires averted thanks to shutoffs 3 By Kim Noyes, Mark Williams, Pamela Alley ● PG&E Interactive Outage Map By Kim Noyes ● See How Fast Small Fire Can Get Into Homes: Wildland-Urban Interface Fire, Initial Attack, Reno F.D. By Kim Noyes ● Is Florida the Answer to California's Fire Problem? By Kim Noyes ● Report released on the entrapment of firefighter and two civilians on Kincade Fire 2 #kincadefire By Kim Noyes, Rick Bates, NK7I ● A Contractor Died Fighting a 2016 Wildfire – His Employer Was Just Convicted of Violating Labor Laws #soberanesfire By Kim Noyes ● Red Flag Warnings - NorCal (11/18/2019-PM) By Kim Noyes ● North Ops News & Notes Update (11/18/2019-4:30PM) By Kim Noyes ● 'There were no victories': Netflix releases heartbreaking Camp Fire documentary #campfire By Kim Noyes Home Subscription Messages New Topic   © 2019 Groups.io

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California Disasters Content Reposted on VolcanoMadness Blog

I am curious as to why you have been auto-redirecting my California Disasters content onto your Blogger account entitled "Volcano Madness" for over a decade. You never asked permission and yet filled your blog with my content also without giving credit. Before I take action I would like to hear your side of the story first. I'm a reasonable man.

California Disasters co-Founder & Owner

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[CaliforniaDisasters] The Blackhawk Landslide [Mojave Desert]

The Blackhawk Landslide

Posted by Dave Petley

15 November 2019

The Blackhawk landslide

The Blackhawk landslide is without doubt one of the most impressive rock avalanches on Earth.  It is located at 34.393, -116.773 in the Lucerne Valley on the escarpment that divides the San Bernardino Mountains to the south from the Mojave Desert to the north, in California.  This is a Google Earth image of the landslide source and deposit:-

A Google Earth image of the Blackhawk landslide in the Lucerne Valley of California.

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As the image shows, this is a landslide on a very grand scale.  With an estimated volume of about 300 million cubic metres, the landslide extends over a distance of about 9 km from the crown to the toe, with a deposit that is up to 2 km wide and up to 30 m thick.  The fall height is estimated to be about 1,200 m in total, making this a highly mobile landslide.

The event is not recent.  Dating of the deposit suggests that it may have occurred about 18,000 years ago, although there is huge uncertainty in that date.  However, in the dry desert environment of inland California the landslide is exceptionally well-preserved, and of course the landslide mass contrasts with the valley floor, rendering the mass highly visible.

This is a landslide that is surprisingly poorly investigated.  There is a very nice PhD thesis from 1959 by Ronald Shreeve that is online, which describes the geology and mechanics of the landslide.  This was in the days in which a PhD thesis could be just 84 pages long (there are lessons to learn from that!).   Shreeve describes the geology, and tries to explain the exceptional mobility of the landslide, hypothesizing that it may have moved on a lubricating basal air layer.  There is also a nice blog article about it on the excellent Looking for Detachment blog.  Finally, there is a book chapter from 1978 about the landslide by Brann Johnson, but even the University of Sheffield subscription to Science Direct does not provide access to that one.

This is landslide that would really benefit from a revisit using up to date techniques.  There is exquisite hummocky morphology in the landslide deposit, captured well in the this 2006 Google Earth image:-

Google Earth image of the Blackhawk landslide in California

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And to me, the now dissected landslide source area suggests that this might have been quite a complex event too.  This is a Google Earth image of the landslide scar area; I have annotated the approximate boundaries of the upper part of the deposit:-

Google Earth image of the source area of the Blackhawk landslide.

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The implication appears to be a highly unusual morphology of the landslide scar.  It is not clear to me how the mechanics of this part of the landslide motion would have operated – is there a large volume of stalled material still within the scar area?

Acknowledgement and footnote

Many thanks to my friend funkenbeachin for pointing out this landslide, and for the discussions about it.  He has hypothesised that there may be other events in this area as well – take a look at the image below.    It is not hard to believe that there is more than one landslide deposit on the valley floor:-

Wide angle Google Earth view of the valley floor around the Blackhawk landslide

Source: https://blogs.agu.org/landslideblog/2019/11/15/the-blackhawk-landslide/

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Kim Noyes about.me/kim.noyes

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