Keempat, masyarakat perlu mewaspadai ancaman lahar di alur sungai atau lembah yang berhulu di Gunung Semeru. Hal tersebut mengingat banyaknya product vulkanik yang sudah terbentuk.Most cookies gather anonymous data such as how end users arrive at and use the website. Some cookies are required to let the website to function correctly, however, you m