Servicio Nacional de Geología y Minería (SERNAGEOMIN) reported that an explosion at Villarrica ejected incandescent material around 190 m above the crater rim on 24 July. Some of the incandescent material landed on the flanks and rolled short distances based on the webcam view posted with the report. According to POVI a series of phreatomagmatic pulses on 29 July produced ash plumes and ashfall on the upper E flank. The Volcanic Alert level remained at Yellow (the third level on a four-level scale) and the public was warned to stay 1.5 km away from the crater. SENAPRED maintained the Alert Level at Yellow (the middle level on a three-color scale) for the communities of Villarrica, Pucón (16 km N), Curarrehue, and Panguipulli.

Geological Summary. The glacier-covered Villarrica stratovolcano, in the northern Lakes District of central Chile, is ~15 km south of the city of Pucon. A 2-km-wide caldera that formed about 3,500 years ago is located at the base of the presently active, dominantly basaltic to basaltic-andesite cone at the NW margin of a 6-km-wide Pleistocene caldera. More than 30 scoria cones and fissure vents are present on the flanks. Plinian eruptions and pyroclastic flows that have extended up to 20 km from the volcano were produced during the Holocene. Lava flows up to 18 km long have issued from summit and flank vents. Eruptions documented since 1558 CE have consisted largely of mild-to-moderate explosive activity with occasional lava effusion. Glaciers cover 40 km2 of the volcano, and lahars have damaged towns on its flanks.

Sources: Servicio Nacional de Geología y Minería (SERNAGEOMIN), Sistema y Servicio Nacional de Prevención y Repuesta Ante Desastres (SENAPRED), Proyecto Observación Villarrica Internet (POVI)