From what aspects did the investigators verify the eruption history of Tengchong volcano?

1. Find records about Tengchong volcanic eruption, including local chronicles, geographical records, travel notes and other documents.

2. Archaeological excavations were carried out at the site of volcanic eruption, and substances such as volcanic ash and lava formed during eruption were collected, and the exact time of volcanic eruption was determined by geological dating technology.

3. By observing the characteristics of volcanic landforms, such as craters, volcanic cones and pyroclastic rocks. The types and process of volcanic eruption are analyzed.

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