Kamchatka May 2013

In May 2013 a Swarm, or Series, of Moderate to Strong earthquakes has occurred off the SE coast of Kamchatka Peninsula, Russia.
Each Seismic Network often seems to get a different result on the magnitude and the location of each event and this gives a confusing overview of not only the location of the swarm but the shape and trend of the series as a whole.
Here I have taken the data from RAS, GFZ, EMSC and USGS and mapped out each Network’s data for the same time period period 14/05/2013 10:19 to 21/05/2013 04:59.
Lower down the page are two animations showing the differences in the locations estimated by each Network, at different scales 50km and 100km.

Interactive Maps

Click on Icon for event details.
To view larger map and the list, which has newest events at the top, click on text “View Larger Map” below map.

RAS

summary

mag4= 24 , mag5= 39 , mag6= 5
total= 68
total energy released= 192,677.60 TTNT

GFZ

summary

mag4= 25 , mag5= 38 , mag6= 2
total= 65
total energy released= 134,221.637 TTNT

EMSC

summary

mag4= 47 , mag5= 30 , mag6= 1
total= 78
total energy released= 85,849.879 TTNT

USGS

summary

mag4= 33 , mag5= 22 , mag6= 2
total= 57
total energy released= 72874.611 TTNT

Network Comparison Animations

100km scale

Kamchatka Swarm Animation at 100km scale

50km scale

Kamchatka Swarm Animation at 100km scale

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4 Comments to “Kamchatka May 2013”

  1. Seems to me watching the animations that USGS and EMSC are about in the same place, with fewer from USGS as one would expect. GFZ appears to be similar in terms of the body of the block, but RAS is lower down. I haven’t looked at the data but this would not be anything to do with decimal places would it?

  2. Yes the main block seems to be the in the same spot in all Networks, RAS and EMSC seem to be laid out about the same shape, its GFZ and USGS that are quite different. USGS is the only one with 4 decimal points in the co-ords, the rest have two. GFZ seems the odd one out the way it is split into two seperate clusters with more events up the Petropavlovsk Valley. and under the Avachinskaya/Koryaksky volcano group on the NW side, which could be important.
    They only way to find out if decimal points have an effect is to run the USGS data down to two decimal points. I’ll look into that.
    Thats some airport they have there, I measured the main runway at 3.5km long!

    • Took me ages to find which ‘airport’. The one in the town is 0.66km. That large runway is obviously a military airfield. Jet fighters and stuff lying around all over the place.

  3. Thanks for asking the question about decimal points, I think we can eliminate that as a cause of the discrepancy.
    I did this map animation after converting the USGS data to 2 decimal places and then comparing that with the original 4 decimal places.
    Even at 20mi/20km scale there isn’t much difference at all.

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