Pacific Daylight Time) occurred onshore, 4 km west of Petrolia at a depth of 10.5 kilometers, and was among an infrequent number of earthquakes with fault-plane solutions that conveyed evidence of slip at the Cascadia subduction zone.
Nonetheless, infrequent earthquakes generated by intraplate active faults do occur and have caused significant damage (e.g., Lim and Godwin 1992), in part because the rarity of historical damaging earthquakes does not encourage implementation of seismic designs, preparation for earthquake-caused emergencies, and the systematic study of active faults.
These factors are the absence of data quality assurance mechanisms in practice with little attention paid to this issue even in policy (14, 31, 32), infrequent supervisory support that might correct faults and weaknesses in the HMIS departments (33), and organizational barriers to registration of events.
But that is not an infrequent complaint about productions of "Playboy," so the fault — to American ears — may lie just as much in Synge's dialogue.
On the other hand, for the Shionohira and Idosawa faults antithetical relationships are presented, maybe suggesting that large normal faultings have been infrequent historically.
Toyota initially faulted drivers, saying the problem was a result of infrequent oil changes.
Long-term (10 5) years) fault slip rates test the scale of discrepancy between infrequent paleoseismicity and relatively rapid geodetic rates of dextral shear in the Eastern California Shear Zone (ECSZ).
It is generally recognised that the study of intraplate earthquakes is a difficult task because their seismogenic faults may have minor features, strain rates are low, and large size earthquakes are infrequent (Dunn and Chapman, 2006).
PROFANITY -- Mild and infrequent.
PROFANITY -- Infrequent but strong.
