منحنى المسافة- الزمن (T-X curve)

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This page is a translated version of the page Dictionary:Time-distance curve (T-X curve) and the translation is 60% complete.
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رسم بياني لوقت الوصول مقابل المسافة من المصدر إلى المستقبل الزلزالي. ويستخدم في تحليل السرعة وتفسير الأحداث الانكسارية (موجات الرأس). وميل مقاطع المنحنى يعطي مقلوب السرعات الظاهرية لمختلف طبقات الانكسار. انظر أيضًا منحنى وقت السفر العادي ، وتصحيح وقت السفر ، والشكل T-8.

ويتم أحيانًا تكوين منحنيات المسافة الزمنية من القياسات التي تم إجراؤها في بعد أقصر (انظر الشكل T-8d).

FIG. T-8. (a) Refraction time-distance curves RA,RB=reflections from A,B. HA,HB=head waves at A,B. WA, WB=wide-angle reflections from A,B. (b) Wavefront diagram showing first arrivals. (c) Wavefront diagram showing first arrivals from an idealized salt dome. (d) Composite time-distance curves (dashed lines) constructed from arrival curves from sources 1, 2, 3, 4, and 5 (solid lines). Refraction portions from sources 2, 3, and 4 have been displaced upward to show the ‘‘equivalent arrival times’’ as if the profiles from these sources had been longer. Such displaced curves should overlap for confidence and show the same reciprocal time tr. Actual time-distance curves from these sources might have been different if another refractor had been reached (e.g., dotted lines).


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