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Note: This topic is for the Pro version of the program only. See here for the Standard version.
Most of you will be using the compact data solution, and I place reasonably regular updates on the web site so if you missed some days you can download and install the complete data from the beginning of 2011. The facilities to do this are in the new Data Centre.
This is the View menu where you get at the earthquake data.
First let’s take a look at the data, and then I will explain how you get new data.
Click on ‘Open Quake Data (7 days)’ or press the number key 7, for 30 days use the corresponding menu item or press the letter key M, or for 365 days use the menu item of press the letter key Y and you should see a screen like this: (Cick this image for the full version)
This screen is the same for both the Pro versions with some very minor differences in context menuing. If you are used to the standard event lists screen you will find that whilst the actual data display portion is the same the facilities are not.
First off there is more vertical space for the list. This is because the toolbars that were at the top have been moved to pop-out windows using the tabs found at the left hand side of the screen.
The page shows the following detail:
- Earthquake ID
- The Network source that provided the data
- The File source that provided the data (this is an internal value)
- The Version of the information
- The date of the event (UTC = GMT)
- Magnitude – (Each provider has default minimum values)
- Magnitude Type
- Energy KJ
- Number of Reporting Stations
- Depth of the event
- Location of the event
- A felt flag indicator
- A status letter
- U – Unknown status
- A – Automatic entry
- R – Reviewed by seismologist
- M – Manual calculation
- C – Confirmed
- Revised – a tick box showing if the data has been updated.
I will go into further detail on some of these later on.
The number of lines count which is in the ‘status bar’ at the bottom of the main screen tells you the count of lines of all providers currently on screen.
This also shows which version of the databases you are using. (You can actually see all of this on the full version of the main page above)
The back colour of the magnitude value
These are set in Program Settings in the Data Centre. You may of course choose any colour you like. (The QVS file buttons for Google Earth do NOT change colour if you change these colours)
The Data List
Generally providers will be turned on when you open the screen. The ability to 'pin' this to selected providers will be given in the next release. Currently you have these providers
- USGS – the United States Geological Survey – which provides information that is updated every 5 minutes on magnitude 4.5 earthquakes and upwards worldwide and magnitude 1.0 and upwards for the United States
- EMSC – The European Mediterranean Seismological Centre – which provides information of Magnitude 2.0 upwards in Europe and many other areas including most world Magnitude 4 and upwards events
- GeoNet (New Zealand) – The New Zealand earthquake service – which provides details of earthquakes in the New Zealand region, generally from Magnitude 1.0 upwards
- JMA – the Japan Meteorological Agency reporting on local earthquakes to Japan which appear to be from 2.0 ML upwards. (I do not get the world wide earthquakes from them).
- Canada – 30 days data from Natural Resources Canada, generally restricted to the region of Canada.
- NOA BBNet (Greece)
- GFZ Potsdam
- British Geological Survey (UK and Ireland)
- GeoScience (Australia)
Currently in the sausage machine are Chile and Iceland and I hope to get Iran and the Turkey in there very soon. The information currently available gives good coverage of Magnitude 4.0 and upwards earthquakes worldwide.
The first tab deals with criteria selections for the earthquakes in terms of location (region), latitude and longitude, magnitudes etc. Although the functionality of these criteria will be familiar to those who have used the standard version the layout will not. Running from the top downwards the selectable criteria are as follows:
Say you wish to see events in Oklahoma. Type in the word oklahoma and then click Filter/Refresh or press F5 (The auto fill may come up as you type)
Now you have only events with ‘Oklahoma’ contained in the location. You can do the same for networks, but these are not remembered. You can also search for multiple names. This is done by using the pipe symbol ( | ). If you wanted to select Washington, Oregon and Vancouver in order to get Cascadia earthquakes you would enter washington|oregon|vancouver. Searches are NOT case sensitive.
Clicking the Criteria Info button gives you this screen
The statement that pipe symbol searches are not saved is actually not strictly true. By default these searches are not saved, but you can turn that on so that they are. This is done in the drop down phrases editor which appears when you click the Edit Phrases button.
Check "Permit saving of multi-part filters"
If for example you want all of Hawaii, enter hv in the network source box. Generally networks are only relevant to USGS entries, and even the bulk of those will have a network of us.
You can further refine your selection by magnitudes and in the Pro versions you can select both a minimum and a maximum value. Clicking the Magnitude Info button displays this screen dialogue.
The filters can be combined so you can select quakes in the HV network that include Mauna Loa and are >= Mag4.
Further filtering is possible, either on it’s own or in addition to the above, by using the latitude/longitude filters. these are entered as a minimum and maximum for both latitude and longitude creating a box area. I am afraid that QVS Data does not provide circular searches (yet) as I have not got my head round the maths! Mathematics and me are not good partners.
If you make an error the program should correct it if it is one such as entering the min and max the wrong way round. Easily done if you forget in a rush that -69 is less than -65.
There are also several built in ‘shapes’, to which you can add your own. To add a shape enter the co-ordinates in the boxes and then click ‘Save Shape’
For example you want to just select Iceland, without the bulk of the Tjornes fracture zone and Reykjanes ridge areas. Pick your co-ordinates with Google Earth’s grid turned on.
Latitudes 62.25N to 66.25N will about do it, although that also excludes some of the extremities. For longitude 24W to 13W covers most of it. West is always negative so 24W is less than 12W as it is -24 to -12. Enter these in the boxes. Then click ‘Save Shape’.
Just to prove to yourself that it works, close the form and re-open it and go and find ICELAND in the shapes.
If you select that and then click Refresh the coordinates for that shape will be entered in the boxes. The relevant entries will be listed. To edit a shape change the co-ordinates and click ‘Save Shape’ again. For example -12 may be too far off the coast and you meant -13. Type in -13 for the maximum longitude. You MUST make sure you type in the name again EXACTLY as it appeared before otherwise you will get a new entry with the misspelt name!
You will see that there are an addition two entries at the bottom of the list. The ANSS and Centennial data can be displayed, if you have selected a date range that is relevant. The ANSS data is still kind of experimental as the final import method has not been decided yet. The Centennial catalogue only runs up to June 2002 thus will not produce any results after that date.
Locations in the Centennial and ANSS catalogue are the FE/GL locations that are used for the GeoNet locations. The Centennial and ANSS use the GeoArea of the FE scheme.
If all the selections are ticked and you just want one, UN-TICK the one you want and then click on the Toggle Button. If some are un-ticked and you just want one click on All ON and then proceed as above. You could also click All ON twice and then just tick the one you want. Comes to the same thing.
Still being worked on. Please call back.
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This page was last updated 09 September 2013