Hi Op, thanks for the thread.
This helps to show why I (for one) don't rely on RSOE EDIS as a source of info. Their reporting of locations is sometimes erroneous and this is a good
example. Though a couple of other posters have pointed out that they have the location wrong I'd like to show why:
Here's the data from the RSOE site. (I prefer to post it as the link could become a "404" in the future.)
6.3
Mercalli scale: 7
Date-Time [UTC]: 10 November, 2010 at 04:05:24 UTC
Local Date/Time: Wednesday, November 10, 2010 at 04:05 at night at epicenter
Location: 45° 32.274, 96° 23.628
Depth: 10.70 km (6.65 miles)
Region: South Pole
Country: French Southern Territories
Distances: 2,003 km (1.24 miles) S of Port-aux-Francais, Territory of the French Southern and Antarctic Lands
Source: USGS-RSOE
Linky (because T&C's require we give them in our posts, even
though you did already).
Here's the data from USGS for that actual quake:
Magnitude 6.3
Date-Time
* Wednesday, November 10, 2010 at 04:05:24 UTC
* Wednesday, November 10, 2010 at 10:05:24 AM at epicenter
* Time of Earthquake in other Time Zones
Location 45.538°S, 96.394°E
Depth 10.7 km (6.6 miles)
Region SOUTHEAST INDIAN RIDGE
Distances 2250 km (1400 miles) SW of PERTH, Western Australia, Australia
Here's the
source
Now let's do a comparison.
The magnitude, date, time and depths match. Well,except that RSOE has the local time the same as UTC, which is absurd. But errrmm... otherwise, all
okay there. This is useful, because it helps to find the
real quake location when RSOE messes it up.
Now note the location.
RSOE has : 45° 32.274, 96° 23.628
USGS has: 45.538°S, 96.394°E
First point: RSOE's data incorrectly gives a
northern latitude, meaning it places this quake in the northern hemisphere, while the USGS data
clearly shows it's a
southern latitude! If you copy and paste RSOE's coordinates for this quake into Google Earth, it'll take you to a location
near the Mongolian/Chinese border region.
Please note that by default (and by international scientific and navigational standards), any latitude that is shown
without a "direction" sign
is considered to be North, and longitudes without such a sign are always East. The alternative is to place a minus sign before South or West
coordinates. For example, all locations in the US states only need their latitude written as it is, (with no "N"), but their longitudes
must be
shown either with "W" or with a minus sign prefix. If you don't put that W or minus sign then your location is on the other side of the world --
meaning that a California location will show up as being somewhere around Afghanistan if you miss out that vital "W" for the longitude.
Often, organizations will show N/S and E/W direction indicators anyway, but where those are absent then the coordinates are (by default) N and E. The
problem is that RSOE sometimes gets this wrong...like they did here.
Because RSOE has left out the "S" symbol, they have the quake's coordinates in the
wrong hemisphere.
Second point: it's almost impossible to figure out how RSOE arrives at the South Pole as the "Region". It doesn't match up with their stated
coordinates and also bears no relation to the correct location either. It's an absolute mystery how they got this.
Summary:
Granted, RSOE is a useful source for getting some quick data. However, its data collection and interpretation are badly flawed and just cannot be
relied upon. I can only recommend that if you find a quake reported there, then it's vital to check it from other sources that are specialized in the
subject and known to be reliable. And seeing as RSOE claims USGS as their source, the logical thing is to bookmark the
USGS world quake map page (updated in near real time) and use
that as a
reference source. It has a lot more quake info available than RSOE anyway and is very rarely wrong.
If RSOE reports a quake in Europe and it's a smallish one that USGS might not show on its maps, then no problem: just go to the
EMSC (European and Mediterranean Seismic Centre) page and check it there.
It's far better to use reliable, specialized sources than RSOE for info like this. I'll put it this way: I have never yet seen USGS or EMSC put a
quake on their maps in the
wrong hemisphere, let alone give coordinates that locate it near China and then say it's at the
South Pole!
Best regards,
Mike
edit on 10/11/10 by JustMike because: Some lil notes.