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title of the thesis - Department of Geology - Queen's University

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B.4 Temporal Distribution <strong>of</strong> Seismic Event Parameters<br />

Events belonging to Clusters 1, 2 and 3, as identified in Chapter 3 are plotted to assess temporal<br />

variation. Events are shown in grey; a moving average <strong>of</strong> 50 events is shown in black. Events are as<br />

labeled. Bottom axis represents local time.<br />

Parameter units are summarized here:<br />

Seismic moment, Nm<br />

Energy, J<br />

Source radius, m<br />

Asperity radius, m<br />

Static stress drop, Pa<br />

Apparent stress drop, Pa<br />

Dynamic Stress drop, Pa<br />

Maximum displacement (m)<br />

Peak velocity, m/s<br />

Peak acceleration, m/s 2<br />

B.4.1 Temporal Distribution <strong>of</strong> Cluster 1 Events<br />

Moment Magnitude<br />

0.5<br />

0.0<br />

-0.5<br />

-1.0<br />

-1.5<br />

-2.0<br />

04/01/2006<br />

04/03/2006<br />

04/05/2006<br />

04/07/2006<br />

04/09/2006<br />

04/11/2006<br />

04/01/2007<br />

04/03/2007<br />

04/05/2007<br />

04/07/2007<br />

04/09/2007<br />

04/11/2007<br />

140

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