Western Anatolia is one of the world’s most seismically active regions. A nearly N–S-oriented extension caused the formation of E–W- and NE–SW-trending major grabens, creating the potential for earthquakes with magnitudes ≥ 5. The fault segments of the NE-trending Çameli Basin were evaluated using geomorphic indices, common tools for assessment of relative tectonic activity in such areas. Quantitative measurement of geomorphic indices including mountain-front sinuosity (Smf; 1.35–2.39), valley floor width-to-height ratios (Vf; 0.08‒0.37), and hypsometric integral (HI; 0.31–1.05) suggest relatively higher tectonic activity along western and southern part of the basin. Hypsometric curves for all segments of the faults mostly exhibit concave or straight profiles, signifying existence of young mountain fronts in the Çameli Basin. These calculations indicate that the Çameli Basin is tectonically active and, southern/south-western areas of this depression have earthquake potential, consistent with epicentres of recent earthquakes, occurred along some fault segments. Possible reason of this activity seems to be related to the E–W-trending corridor lying between the Gulf of Gökova and south-eastern part of the Çameli Basin, represented by active normal faults. These findings should be valid beyond the Çameli Basin for similar situations along the Isparta Angle’s western margin.

中文翻译：

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使用地貌指数对西安纳托利亚恰梅利盆地的相对构造活动进行评估

西安纳托利亚是世界上地震最活跃的地区之一。近 N-S 向的伸展导致形成 E-W 和 NE-SW 向的主要地堑，创造了 ≥ 5 级地震的潜力。 使用地貌指数评估了 NE 向的 Çameli 盆地的断层段，用于评估这些地区相对构造活动的常用工具。包括山前曲折度 (Smf; 1.35-2.39)、谷底宽高比 (Vf; 0.08-0.37) 和测高积分 (HI; 0.31-1.05) 在内的地貌指数的定量测量表明沿线的构造活动相对较高盆地西部和南部。断层所有段的测高曲线大多呈现凹形或直形剖面，表明恰梅利盆地存在年轻的山峰。这些计算表明，Çameli 盆地构造活动活跃，该凹陷的南部/西南部地区具有地震潜力，与近期地震的震中一致，沿某些断层段发生。这种活动的可能原因似乎与位于 Gökova 湾和恰梅利盆地东南部之间的东西向走廊有关，以活动的正断层为代表。对于 Çameli 盆地以外沿 Isparta Angle 西缘的类似情况，这些发现应该是有效的。这种活动的可能原因似乎与位于 Gökova 湾和恰梅利盆地东南部之间的东西向走廊有关，以活动的正断层为代表。对于 Çameli 盆地以外沿 Isparta Angle 西缘的类似情况，这些发现应该是有效的。这种活动的可能原因似乎与位于 Gökova 湾和恰梅利盆地东南部之间的东西向走廊有关，以活动的正断层为代表。对于 Çameli 盆地以外沿 Isparta Angle 西缘的类似情况，这些发现应该是有效的。