The Geological Agency, the Center for Volcanology and Geological Hazard Mitigation (PVMBG), reported that Mount Merapi, located in the border area of Sleman, Magelang, Boyolali, and Klaten in the Special Region of Yogyakarta and Central Java, is still at Level III alert status. The volcanic activity report was released in the Volcanic Activity Report for the observation period of July 1, 2023.

Based on meteorological data collected during the observation period, the weather in the region tends to be clear with some clouds. The wind blows gently or weakly towards the west, north, and east. The air temperature ranges from 16 to 20.4 °C, humidity levels range from 69% to 99%, and the air pressure ranges from 838 to 919.5 mmHg. During this period, the daily rainfall reached 7 mm.

Visually, Mount Merapi is clearly visible with a haze level of 0-III. The observed volcanic smoke from the crater has weak pressure, appears white, and reaches a height of 10 meters above the crater's peak. There were also 24 instances of lava flows with a maximum sliding distance of 2000 meters towards the southwest, specifically towards Kali Beben. Additionally, one moderate intensity eruption sound was heard from Babadan Post.

Seismic data recorded various types of volcanic activity. There were 194 instances of avalanches with amplitudes ranging from 3 to 34 mm and durations ranging from 31.4 to 194.96 seconds. Furthermore, there were 37 instances of hybrid or multiple-phase earthquakes with amplitudes ranging from 3 to 12 mm and durations ranging from 4.76 to 9.56 seconds. Additionally, shallow volcanic earthquakes occurred 7 times with amplitudes ranging from 27 to 66 mm and durations ranging from 7.32 to 12.32 seconds. Lastly, there were 5 instances of distant tectonic earthquakes with amplitudes ranging from 3 to 16 mm, S-P (arrival time of S-wave minus arrival time of P-wave) ranging from 7.6 to 14.16 seconds, and durations ranging from 42.88 to 109.52 seconds.

The report also emphasizes that Mount Merapi is currently still at Level III alert status. PVMBG recommends several preventive measures for the community. Firstly, the current potential hazards mainly include lava flows and pyroclastic flows that may occur in the southwest sector, covering Boyong River up to a maximum distance of 5 km, Bedog, Krasak, and Bebeng Rivers up to a maximum distance of 7 km. In the southeastern sector, potential hazards include Woro River up to a maximum distance of 3 km and Gendol River up to a maximum distance of 5 km. Additionally, in the event of an explosive eruption, volcanic material projections can reach a radius of 3 km from the summit of Mount Merapi.

Secondly, the public is requested to refrain from engaging in any activities in the designated hazard areas. Thirdly, the community is advised to be cautious of disruptions caused by volcanic ash that may occur due to the eruption of Mount Merapi, especially during rainfall around Mount Merapi. Finally, if there are significant changes in activity, the status of Mount Merapi's activity will be promptly reviewed.

Despite Mount Merapi remaining at Level III alert status, the authorities continue to monitor the situation and urge the public to remain vigilant and follow the provided safety instructions.