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Date and Time (UT)
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All dates (year/month/day) and times (hour:minute:seconds) are listed in Coordinated Universal Time (UTC). This is the modern equivalent of Greenwich Mean Time (GMT) and is 5 hours later than Eastern Standard Time (EST), 8 hours later than Pacific Standard Time (PST). The difference is 4 and 7 hours respectively when compared with Daylight Saving Time.
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Lat and Long
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Geographic latitude (degrees North) and longitude (degrees West) of the epicentre in decimal degrees.
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Depth
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Depth of the focus (hypocentre) given in kilometers below sea level. A focal depth assigned by a geophysicist is marked as "*". Where there are insufficient data from seismograph stations to determine depth directly, assigned depths are based on regional earthquake knowledge. Commonly assigned depths include 0, 1, 5, 10, 15, 18, 20, 30 and 35 km.
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Mag
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Earthquake Magnitude. In Canada, several magnitude types are used:
- ML - Local, or Richter magnitude.
- MN - Nuttli, or body wave magnitude. Used for earthquakes in eastern Canada.
- Mw - Moment magnitude.
- MB and MS - Compressional body wave and surface wave magnitudes.
Please note that very small earthquakes can have a negative magnitudes. For more information on magnitude types and other questions about magnitude, visit our Frequently Asked Questions section on magnitude.
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F
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An earthquake that has been reported felt by the public.
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REGION and COMMENT
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Epicentral region or distance and direction to a nearby city.
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