Crosscorrelation of Earthquake Data Using Stationary Phase Evaluation: Insight into Reflection Structures of Oceanic Crust Surface in the Nankai Trough

<table>Source <b>x </b><i><sub>S</sub></i> is a stationary source for the crosscorrelation pair <svg height="12.0375" id="M38" style="vertical-align:-3.276pt" version="1.1" viewbox="0 0 51.962502 12.0375" width="51.962502" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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<g transform="matrix(.012,0,0,-.012,8.562,11.975)"><path d="M716 28l-8 -28h-254l8 28q55 5 66 17.5t5 47.5l-30 145h-232l-74 -138q-21 -43 -11 -54.5t72 -17.5l-6 -28h-235l8 28q53 7 73.5 21t53.5 70l319 540l33 8q6 -43 33 -176l80 -381q10 -49 26.5 -63t72.5 -19zM495 281l-49 264h-2l-149 -264h200z" id="x1D434"></path></g>
<g transform="matrix(.017,0,0,-.017,21.688,7.9)"><path d="M535 230h-483v50h483v-50z" id="x2212"></path></g><g transform="matrix(.017,0,0,-.017,35.439,7.9)"><path d="M484 24v-24h-241v24q45 3 45 20q0 16 -33 64q-23 32 -42 63l-16 -20q-64 -76 -64 -103q0 -21 50 -24v-24h-169v24q27 1 49 19q20 16 64 74l43 56q8 9 11 14t11 14l-128 197q-15 23 -24 29.5t-28 9.5v24h250v-24q-47 -2 -47 -19q0 -22 58 -98q7 -8 13 -17l36 46
q38 50 38 64q0 11 -6.5 15.5t-24.5 6.5l-20 2v24h168v-24q-45 -8 -70 -39l-101 -126l148 -228q7 -12 30 -20z" id="x1D431"></path></g>
<g transform="matrix(.012,0,0,-.012,43.938,11.975)"><path d="M594 511q0 -122 -171 -157l1 -2q158 -33 158 -159q0 -52 -34.5 -95t-90.5 -65q-76 -33 -217 -33h-223l8 28q63 5 79.5 19t26.5 72l83 426q9 48 -2.5 60t-77.5 17l6 28h259q195 0 195 -139zM499 509q0 59 -37 83t-91 24q-36 0 -51 -9q-17 -9 -22 -44l-35 -195h62
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</svg>, but not for the pair <svg height="21.7875" id="M39" style="vertical-align:-3.276pt" version="1.1" viewbox="0 0 59.900002 21.7875" width="59.900002" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
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q38 50 38 64q0 11 -6.5 15.5t-24.5 6.5l-20 2v24h168v-24q-45 -8 -70 -39l-101 -126l148 -228q7 -12 30 -20z" id="x1D431"></path></g>
<g transform="matrix(.012,0,0,-.012,8.562,21.725)"><path d="M716 28l-8 -28h-254l8 28q55 5 66 17.5t5 47.5l-30 145h-232l-74 -138q-21 -43 -11 -54.5t72 -17.5l-6 -28h-235l8 28q53 7 73.5 21t53.5 70l319 540l33 8q6 -43 33 -176l80 -381q10 -49 26.5 -63t72.5 -19zM495 281l-49 264h-2l-149 -264h200z" id="x1D434"></path></g>
<g transform="matrix(.017,0,0,-.017,25.65,17.65)"><path d="M535 230h-483v50h483v-50z" id="x2212"></path></g><g transform="matrix(.017,0,0,-.017,43.363,17.65)"><path d="M484 24v-24h-241v24q45 3 45 20q0 16 -33 64q-23 32 -42 63l-16 -20q-64 -76 -64 -103q0 -21 50 -24v-24h-169v24q27 1 49 19q20 16 64 74l43 56q8 9 11 14t11 14l-128 197q-15 23 -24 29.5t-28 9.5v24h250v-24q-47 -2 -47 -19q0 -22 58 -98q7 -8 13 -17l36 46
q38 50 38 64q0 11 -6.5 15.5t-24.5 6.5l-20 2v24h168v-24q-45 -8 -70 -39l-101 -126l148 -228q7 -12 30 -20z" id="x1D431"></path></g>
<g transform="matrix(.012,0,0,-.012,51.875,9.488)"><path d="M227 744l-123 -338l-31 15l73 368q12 3 41.5 -8t36.5 -20z" id="x2032"></path></g><g transform="matrix(.012,0,0,-.012,51.875,21.725)"><path d="M594 511q0 -122 -171 -157l1 -2q158 -33 158 -159q0 -52 -34.5 -95t-90.5 -65q-76 -33 -217 -33h-223l8 28q63 5 79.5 19t26.5 72l83 426q9 48 -2.5 60t-77.5 17l6 28h259q195 0 195 -139zM499 509q0 59 -37 83t-91 24q-36 0 -51 -9q-17 -9 -22 -44l-35 -195h62
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</svg>.</table>

International Journal of Geophysics

fig3

Figure 3

Figure 3: Crosscorrelation of Earthquake Data Using Stationary Phase Evaluation: Insight into Reflection Structures of Oceanic Crust Surface in the Nankai Trough 

Figure 3 | Crosscorrelation of Earthquake Data Using Stationary Phase Evaluation: Insight into Reflection Structures of Oceanic Crust Surface in the Nankai Trough 