Quake Event Lists (Standard)


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Note: This topic is for the standard version of the program only. See here for the Pro 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.

Click to see how you can avoid missing data.

This is the file menu where you get at the earthquake data.

main-selection-menu_rev60

First let’s take a look at the data, and then I will explain how you get new data. You can jump to the end to find out about RED – Rapid Earthquake Display.

Click on ‘Open Quake Data (7 days)’ or press the letter 'q' (Small q for 7 days and shift +q for 30 days) and you should see a screen like this: (Cick this image for the full version)

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)
  • Latitude
  • Longitude
  • Magnitude – (Each provider has default minimum values)
  • Magnitude Type
  • Energy KJ (Pro Version only)
  • Number of Reporting Stations
  • Depth of the event
  • Location of the event
  • 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)

setting-mag-colours

The Data List

(For the VERY few of you who got to see the initial beta, the automated amalgamation of quakes has been removed in favour of switching provider information off/on.)

Generally all three 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 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 – The New Zealand earthquake service – which provides details of earthquakes in the New Zealand region, generally from Magnitude 1.0 upwards. Later I may add Australia into the standard version. The information currently available gives good coverage of Magnitude 4.0 and upwards earthquakes worldwide.

As you will note each of these is checked. Simply uncheck the one you don't want to see and click refresh or hit F5.

The next button on that row is not functional as I have indicated.

If you turn all the providers off thus:

The program will ignore you and turn them all back on again.

Note that if you are viewing Revisions or Deletions the Provider buttons will be disabled.

Viewing revisions:

If the revisions box is ticked, double-click the line and you will see a screen like this (without the highlight ring of course!):

This shows the current information on the top line, and then the previous information in descending date order. In this instance I have marked the change with a circle. It is not always obvious and in the case of USGS you may wonder why a record is a revision sometimes. Some of it may be explained below.

Please note that any formatting (a new feature I have not explained yet) you may have set up is NOT used either in this box or the revisions viewer. (See below)

There is a reason for this which is because if you are viewing revisions you need to see the full data. Since Longitude and Latitude are held up to 5 decimal places, magnitude and depth to 4 places, and date time to milliseconds a difference may be lost to view if it is small.

You may be using magnitudes at one decimal place but the revision may be say a change from 5.97 to 5.91. This would not show on a restricted view.

A note here about the way data is stored. Whereas the original standard version stored all the 'live' data in one table that has changed and now each provider has a table for data just as in the Pro version, but the revisions and deletions are each stored in a table on their own. Does this matter to you? No. not in the least! I just offer the information in case you are interested. This however is the reason that you cannot select providers in the Revisions and Deletions screens.

Using the filters

All of the items that you can use to filter the dataset are contained in the block at the top of the form. I have already mentioned the Provider Selections, which also are a form of filtering but now I will go through the rest.

You can enter a phrase to search for in the location, and / or a magnitude or even the network. Locations entered will be remembered. You can alternatively enter a rectangle of latitude and longitude. You can also store these for later retrieval.

This is the location filter area

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.

The green information button beside the filter field next to the Edit Filter Phrases button just gives you a quick reminder of how to use the form. The text is:

You can type a location into the filter box, or multiple phrases (locations) separated by the pipe symbol | , or you can use latitude and longitude to determine a rectangular area.

If you make an entry into the latitude and longitude boxes, then all the boxes must be filled otherwise the system will revert to using the filter box data for location.

If you use the | symbol the text entered will not be saved, otherwise entries are saved and can be edited using the 'edit phrases' button.

Latitude/Longitude data has precedence over location data. (Don't worry if you get the negative ones the wrong way round, i.e. min lon = -110, max lon = -111, the program will correct it.

So two points here, the edit button and using the pipe symbol. The pipe symbol | (a shifted backslash) is the separator for words of phrases in the search function. Say to want quakes in the current list for Tonga and Fiji. Just type in tonga|fiji and click refresh. Now you will only see results where those names appear in the location.

Searches with pipe symbols will not be saved unless this facility is turned on. This can be done using the Edit Phrases facility. It can also be turned on in the Program Settings. I have highlighted the checkbox on this shot of the editing screen.

The magnitude filter

There is a default magnitude which when you first install the system is 1.0

This can be set to any value you want and 'pinned' as the default using the 'pin' beside the box. The information button beside the magnitude 'pin' gives the details.

When you use 'clear' it reverts to its default value as do the other settings but NOT the providers. You do this by clicking 'Clear ALL' or by pressing F4. Currently you then have to click the refresh button. I may change that behaviour.

Filtering by latitude and longitude

To use the Latitude and Longitude rectangle you need to make an entry in all four boxes.

Lon(Min) – Longitude Minimum can be between -180 and (+) 180
Lon(Max) – Longitude Maximum can be between -180 and (+) 180
Lat(Min) – Latitude Minimum can be between -90 and (+) 90
Lat(Max) – Latitude Maximum can be between -90 and (+) 90

Always bear in mind that 0 deg of longitude is the Greenwich Meridian and anything west of that until it meets the International date line is a negative value, thus London is 0 deg, Ireland is -8 to -9 deg and Yellowstone is around -110 deg.

Similarly latitude above the equator is + and below is – (negative) thus the North Pole is 90 deg and the South Pole is -90 deg.

If you double click in the blank area beside the box saying Compact you will see this:

This is delta information you will need if you are downloading from ANSS and is a 50km circle around the middle of Yellowstone. It is just a little 'Aide-mémoire'.

So Yellowstone is around 44.5 deg N and 110.5 deg W. Using this information let’s create a box.

-111 is less than -110. But don’t worry, the program knows what you mean if you get it wrong and will have changed if before getting the data. It displays its change.

This will return results in the rectangle

You can save this information as one of your ‘shapes’. (This same shape information is used in the Cumulative and Magnitude graphing and can be created there as well). Just click on the 'Save Shape' button and follow the instructions.

You will be asked to add a name for the shape

When you click on OK the shapes is added to the drop down list and is immediately available.

I added some very silly locations to get these screen shots, but I can use that now to show you that whilst it does not actually say so, you can use this same process to edit a shape.

Here is the current data.

I want to change this to Lon 20 to 25

Simply edit the Lon Min and Lon Max boxes and then save the shape again WITH THE SAME NAME and it will overwrite the current details.

You can also edit the shapes in Settings

In the next release you should be allowed to create circular areas and perhaps even polygons.(I may be over-stretching my mathematical capabilities there!)

Back to the text filter:

Did it remember what I typed?

Yes it did!

You can edit the list by clicking on (or when the mouse is over it.)

Note: By default multi-part filters ( for example “yellow|calif” ) are not saved, however if you tick the ‘Permit saving of multi-part filters’ box they will be saved. You can only change this setting here and not in Settings. The | symbol is the ‘pipe’ symbol – a shifted backslash. Here is an example.

All of the above applies to the other versions of the form, except that the comparison of the revision will not function, the Providers are turned off and the Auto-refresh and Multi-select functions are disabled.

That concludes the functionality of the main form but the Context menu, obtained by right clicking the grid, add more functions when you are using the normal display mode. There is no context menu for the Revisions and Deletions screens, but the Data menu functions still work.

RED – Rapid Earthquake Display. This topic has moved.

Other related topics
Display screen Context Menus (Standard)
CSV File Output
Forum Style Lists and Posts

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This page was last updated 30 Oct 2013

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