striking feature of Sunda straits is the volcanic lineament running N3SE direction, from Panaitan island near Ujung Kulon Peninsula ( Java) to Sukadana (SE of Sumatra), and passing through Krakatau archipelago, Sebesi and Sebuku islands, and Mount Rajabasa (Fig. 1). In this group, Krakatau the only volcano which has had historic activity, it is also the only one with strong seismicity
Laboratorium Pusat Sumber Daya Mineral, Batubara, dan Panas Bumi (PSDMBP) merupakan laboratorium yang telah terakreditasi ISO 17025:2017 sehingga berkewajiban untuk memastikan ketertelusuran metrologi dalam setiap pengujian yang dilakukan, contohnya melalui penggunaan in-house standard dalam analisis harian. Pada kegiatan tim ini, dilakukan proses evaluasi nilai kelima in-house standard batugam…
Penyebab terjadinya gempa tremor adalah adanya pelepasan energi karena pergerakan magma yang mengalami gangguan keseimbangan, Untuk mengetahui aktivitas dari magma dapat diketahui dengan menganalisa tremor yang terjadi.
The major role played by magma mixing processes in the origin of intermediate lavas (andesites of the calco-alkalic series and trachy-andesites of the alkalic series) is demonstrated by four different features : 1. Frequent, 2. Position of the lava mixtures, 3. Role played by the transfer of phenocrysts, 4. Geochemical control
Mount Merapi, island are volcano located in the center of Java (Indonesia), lies upon the remnents of a volcano older than 400.000 years called Pre-Merapi. Sensu stricto Merapi is a very young volcano characterised by a rapid edification. Its history is divided into four periods (ancient, Middle aged, Recent and Historical Merapi).