Achieving high CCS reliability is quite straightforward in this manner.
Most of the high CCs were obtained for shallow events 1, 2, and 13 at site 6 in March (Fig. 8a c).
In Fig. 4, vertical and radial components show high CCs (>0.6), but the CCs of transverse components are relatively low (~0.4).
Thus, we could not draw any conclusions about temporal distribution of deep seismic activity because high CCs (>0.7) were obtained for only one deep event at site 7 (event 6; Fig. 8d) and not obtained at site 6.
Based on the sites with high CCs (e.g., IBRH16 and TCGH16), we do not find a clear change of the slope between resonance frequency drop and PGA before and after the Tohoku main shock (Fig. 6).
On the other hand, high CCs for event 6 (deep) were obtained at only site 7, and they were distributed throughout the 3-month period of observation and most of their CCs of less than 0.8 (Fig. 8d).
In 42 patients with a high CCS, positive, negative and nondiagnostic exercise test results were present in 13, 15 and 14 patients, respectively.
In case of a high CCS, defined as CCS≥400, coronary angiography (CAG) was recommended to evaluate the presence of obstructive CAD.
