Wow missed all that
, I was asleep.
3hrs after the events,
Another example of mixed up magnitudes to cause confusion, hows a guy supposed to compile a 100 year Mag7+ list when the various networks are giving
out different magnitudes either side of 7.0 for the same event?
Starting with USGS, the first quake looks smaller in Mw but the bigger one in mb,
MAG, UTC TIME, LAT, LONG, DEPTH, (other magnitudes in phase data)
6.9 Mw, 2010/07/18 13:04:13, -6.116, 150.522, 57.5 (6.3 mb)
7.3 Mw,2010/07/18 13:35:03, -6.019, 150.497, 57.6 (6.0 mb), (7.3 MS)
then Geofon has the same "M" magnitude for both, but the station data says something else, Rabaul says the 2nd quake was the bigger one in ML,
MAG, UTC TIME, LAT, LONG, DEPTH, (other magnitudes in phase data)
7.1 M 2010-07-18 13:04:11, -6.01, 150.44, 44 (7.4 ML at Rabaul , 8.1 ML at Port Moresby)
7.1 M 2010-07-18 13:35:03, -6.02, 150.55, 55 (7.5 ML at Rabaul, 7.9 mL at Port Moresby)
EMSC confuses things more by giving two different types of magnitudes, (no alternative magnitude phase data close by), so making the 2nd quake the
larger
MAG, UTC TIME, LAT, LONG, DEPTH
7.1 Mw, 2010-07-18 13:04:12.0, -6.05, 150.51, 40
6.2 mb, 2010-07-18 13:35:02.0, -6.04, 150.57, 40
What about the Russians?, more confuseski, MS and mb, but using the mb from Rabaul the first quake was bigger
MAG, UTC TIME, LAT, LONG, DEPTH, (other magnitudes in phase data)
7.1 MS, 2010-07-18 13:04:09.2, -6.00, 150.59, 40 (6.7 mb at 10 stations)( 7.2MS and 7.3 mb at Rabaul)
6.4 mb, 2010-07-18 13:34:59.5, -5.98, 150.44, 40 (6.7 mb at Rabaul) -
looking like the first quake makes the list using the 3 European networks, and the 2nd one doesn't, or I could go the other way and just use USGS
data and only the 2nd one makes it
aaaaaaaargh!