Paradox Valley Unit Saltwater Injection Project - Induced Seismicity Potential in Energy Technologies - page 219

Continuous
injection,
early period

Continuous injection,
later period

Injection tests

Injection Flow Rate

450

400

350

300

250

200

150

100

50

0

Jan-91 Jan-93 Jan-95 Jan-97 Jan-99 Jan-01 Jan-03 Jan-05 Jan-07 Jan-09 Jan-11

Induced Seismicity

18

16

14

Northern valley

12

10

8

NW & SE clusters

6

4

Near-well

2

0

Jan-91 Jan-93 Jan-95 Jan-97 Jan-99 Jan-01 Jan-03 Jan-05 Jan-07 Jan-09 Jan-11

all induced events
events with M >= 2.5 and < 3.0
events with M >= 3.0 and < 3.5
events with M >= 3.5

FIGURE K.1 Twenty-year data set collected by the Bureau of Reclamation for the Paradox Valley project.
Upper figure shows the average daily injection flow rate in gallons per minute. Lower figure shows all
induced events and their magnitudes over the same period with distance from the injection well. SOURCE:
Block (2011).