How Otto and Tokage swarm.
These storms are going to be keeping pace with one another, likley until they disappear together. I must admit to not realising this with such. And the rules for different oceans may not be the same.
I don’t remember the algorithms to reduce these things to a more easily followed pattern but it is a mere navigators trick to work out where the eyes are in relation to angular distances.
I really don’t feel like doing it the hard way,with chalk and dividers.
I’d just as soon wait for the inevitable swarms (the recent Magnitude 7.0 will have been North Atlantic tropical storm Otto crossing land.) At present it is rebuilding in the Pacific.
The SED website had a perfectly adequate HTML website until they improved it, now I won’t touch it. The NEIC one is bad enough this is the second choice:
http://ds.iris.edu/seismon/zoom/?view=eveday&lon=-95&lat=17 virtually unusable but at least if highlights swarms. With all said and done you are best just selection the minimal sized earthquake that you want and downloading from the NEIS site. Select the longitude column and rearrange the data (to show the swarming.)
Since 4 .5 M is the best you are going to get outside of the USA, choose Magnitude 5 as your base.And here we have the first swarms:
2016-11-25 at 14:19. 39.14 N. 74.01 E. 5.2 M. S. Xinjiang, China.
2016-11-25 at 14:24. 39.17 N. 74.04 E. 6.5 M. S.Xingjiang, China.