Residents across Turkey spent Tuesday, October 20, checking whether the shaking they felt matched a registered earthquake. Search traffic picked up around questions about tremors in Istanbul and Antalya, and whether the Mediterranean coast had been hit. The country's two main seismic institutions stepped in to answer them. Kandilli Observatory and the Disaster and Emergency Management Authority, known as AFAD, published their latest earthquake lists for the day. Each entry records when a tremor struck and how strong it was, so people can match the data against the jolt they felt at home. Reports of shaking arrived from several regions through the day, feeding the online lookups. Magnitudes can differ slightly between the two institutions, so residents often compare both before settling on a figure. Such pages tend to surge whenever the ground moves anywhere in the country.