According to a news article, INETER reported that at 0751 on 26 June a moderate explosion at San Cristóbal produced a gas-and-ash plume that rose 1.5 km above the crater rim and drifted WSW.
A minor amount of ash fell in the communities of La Grecias 3 and Las Grecias 4 (12 km WSW), and the city of El Viejo (18 km WSW).
RSAM data spiked during the explosion and then returned to normal levels afterwards.
Source: Viva Nicaragua ? Canal 13