Our Active Earth

My seismology chart shows the quakes and aftershock result that has cause great loss of life in Peru. The Richter scale measurement reported were as follows: first hit measuring 7.5; followed by…. 5.8;…. 7.5;….5.9:….5.6:….6.3; respectively. Ouch!


7 thoughts on “Our Active Earth

  1. Dusty

    Hi and cheers for calling on me – it reminded me to check up on you also!
    Loved the garbage truck idea – thanks for that.
    Will now go back and read some more.

  2. swamp

    Morning Kate.
    Just splashing by to say hello. I’ve been away from spaces for a while, for various reasons, (so a lot of catching up to do), but I think I’m back in some way or the other.
    Hope everything is well with you.  🙂  

  3. LAIRD

    Obviously the earth never moves for our friend in the n/east! Manchester had a one only last weekend – 2.3 I think – the last one here was 3.4 or 4.3 about 4 years ago!  It is difficult to comprehend and frightening but then so are severe floods and hurricanes. 

  4. Gareth

    Have a look at the tables in this article that provide some idea of comparative energy released by seismic events of varying magnitudes. The second table compares Richter magnitudes to equivalent amounts of TNT (with a nod of thanks to Alfred the Nobel).
     Recorded here (for what it is worth, this is Wikepedia after all) are the comparatively recent events in Peru (shown as magnitude 8, equivalent to 1 gigaton of TNT) and Indonesia in 2004 (at 9.3 equivalent to 32 gigatons). 
     A gigaton is approximately equal to a seriously large amount, too large for the human mind to comprehend, but it is somewhere near the bazillion mark. That’s how much effort it takes to push those tectonic platelets around just a little bit.
     Also interesting in this article is the estimated energy equivalent of 1 terraton that would be released by the impact of a 20km meteorite travelling quite quickly.
    I’m not sure if this is intended to relate directly (in terms of size) to the "pebble in the pond" that theoretically was the dinosaurs’ exit cue and the beginning of Arab wealth, but following the "meteorite" hyperlink eventually leads to a discussion of the various postulations around this Cretaceous-tertiary event, interesting in itself if only because the word iridium rolls so nicely off the tongue. This also links into a discussion of Tollmann’s hypothetical bolide which is interesting (a) because the geeks concerned used this explain why Noah got drenched and (b) because bolide, like so many other words in this article, are clearly just made-up to give the article a smack of authenticity.

  5. Coffee With Kate

    Hello Mr Gareth.Thank you for your informative comment and the links provided. I immediately went scuttling off to read the content (as you knew I would)….I am as always, fascinated by it all.


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