Final answer:
The Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) was reorganized from the Philippine Weather Bureau on December 8, 1972, enhancing its capabilities in meteorology, geophysics, and astronomy.
Step-by-step explanation:
The reorganization of the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) from the Philippine Weather Bureau occurred on December 8, 1972. This was when Presidential Decree No. 78 was enacted during the administration of President Ferdinand Marcos, which aimed to expand and enhance the services provided by the formerly named Philippine Weather Bureau. PAGASA was given a broader scope of responsibilities to include not just meteorology but also geophysics and astronomy, aligning with modern technological and academic advancements in these fields at the time.The change was part of the country's efforts to improve its scientific services and capabilities in response to the growing need for accurate weather forecasting and disaster preparedness. Since then, PAGASA has continued to develop, now utilizing state-of-the-art technology to study and monitor atmospheric conditions, earthquakes, astronomical occurrences, and other related phenomena.In conclusion, PAGASA's reorganization into its current form was a significant milestone in the Philippines' history of meteorological and scientific development, facilitating better service and protection for its citizens against natural calamities.