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New Background Filters

New Background Filters

We have added some new event filter options to General Analysis related to ‘background’ activity. ‘Background’ events are generally defined as having low variability in space and time. The new background filters aim to identify events that are clustered in space and...

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To a/b, or not to a/b

To a/b, or not to a/b

The a/b value is sometimes used as a measure of seismic hazard but there are some common mistakes made with this analysis and interpretation. What is a/b? The Gutenberg-Richter distribution is a statistical model that describes a log-linear relationship between the...

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Frequency-Magnitude Chart Anatomy

Frequency-Magnitude Chart Anatomy

When you are using the Frequency-Magnitude chart, it can be easy to forget it is log scale and this can distort a few things. Consider the chart below, have you ever thought the Gutenberg-Richter distribution doesn't look right? Think it isn't matching the large...

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Event Tags and Comments

There are many reasons you might want to store a short snippet of text associated with an event. There are two ways to do this in mXrap; event tags and event comments. Event tags can be used to group events into categories. Example tags might be “suspected blast”,...

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