The Minoan eruption is an important marker horizon for the Bronze Age chronology of the Eastern Mediterranean realm. It provides a fixed point for aligning the entire chronology of the second millennium BCE in the Aegean, as evidence of the eruption is found throughout the region. Despite the evidence, the exact date of the eruption has been difficult to determine. Archaeologists have traditionally placed it at approximately 1500 BCE. Radiocarbon dates, including analysis of an olive branch buried beneath a lava flow from the volcano that gave a date between 1627 BCE and 1600 BCE (95% confidence interval), suggest an eruption date more than a century earlier than suggested by archaeologists. Thus, the radiocarbon dates and the archaeological dates are in substantial disagreement. It has also been recently suggested that there may be regional variations in the calibration curve which might alter a date by up to 20 years.