Lumajang, East Java, Nov. 21 -- Mount Semeru, located on the border of Lumajang and Malang Districts, East Java, experienced 45 eruption earthquakes over a six-hour period on Friday, from 12:00 a.m. to 6:00 a.m. local time.

"Seismic observations recorded 45 eruption earthquakes with amplitudes of 10-22 mm and durations of 58-184 seconds," an officer from the Mount Semeru Observation Post, Rudra Wibowo, said in a statement here on Friday.

The post also recorded six avalanche earthquakes from Mount Semeru with amplitudes of 2-4 mm and durations of 40-74 seconds, as well as eight gust earthquakes with amplitudes of 2-4 mm and durations of 34-69 seconds.

"Semeru also experienced five distant tectonic earthquakes with amplitudes of 4-8 mm, ...