Fig. 9From: Offshore seismicity in the western Marmara Sea, Turkey, revealed by ocean bottom observationTime series of seismic activity recorded in the KOERI catalogue for the period 2000–2014. Red circles indicate earthquake events. Histogram of event frequency in 2-week intervals includes only events of M L ≥ 2.5 (above blue dashed line) is also shown in lower panel (orange: for all events, black: for events whose depth > 15 km). Area analyzed is shown by the blue rectangle in Fig. 4 Back to article page