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United States Geological Survey shake map for the 2019 Luzon earthquake; a maximum Mercalli intensity scale value of 6.6 was observed in Gutad, Floridablanca, Pampanga. The Philippine Institute of Volcanology and Seismology (PHIVOLCS) initially reported an earthquake of magnitude 5.7 striking at 17:11 PST with an epicenter two kilometers N 28° E of Castillejos, Zambales.
A magnitude 6.1 earthquake hit the Philippines near Dagupan, Luzon, on June 16, at a depth of 35.3 km. [78] A magnitude 6.4 earthquake struck in the Pacific Ocean 28 km southeast of Ofunato, Japan on 18 June, at a depth of 36 km. [79] A magnitude 6.0 quake struck 24 km northwest of Macquarie Island Australia, on June 22, at a depth of 9.9 km. [80]
Poverty incidence of Naga 10 20 30 40 2006 31.40 2009 27.10 2012 17.23 2015 21.12 2018 15.30 2021 26.02 Source: Philippine Statistics Authority Naga is home to several heavy industries, and as such, the city bills itself as the Industrial City of the South. Among the industries in Naga are the Apo Cement Corporation, the largest factory in the country, producing 4,000 metric tons (3,900 long ...
Saturday's event was the sixth earthquake of magnitude 3 or higher since a magnitude 4.7 earthquake in the same area was widely felt across Southern California on Sept. 12.
Many earthquake magnitude scales have been developed or proposed, with some never gaining broad acceptance and remaining only as obscure references in historical catalogs of earthquakes. Other scales have been used without a definite name, often referred to as "the method of Smith (1965)" (or similar language), with the authors often revising ...
The Richter scale [1] (/ ˈ r ɪ k t ər /), also called the Richter magnitude scale, Richter's magnitude scale, and the Gutenberg–Richter scale, [2] is a measure of the strength of earthquakes, developed by Charles Richter in collaboration with Beno Gutenberg, and presented in Richter's landmark 1935 paper, where he called it the "magnitude scale". [3]
Japan's Earthquake Early Warning system was put to practical use in 2006. The system that warns the general public was installed on October 1, 2007. [25] [26] It was modeled partly on the Urgent Earthquake Detection and Alarm System (UrEDAS ) of Japan Railways, which was designed to enable automatic braking of bullet trains. [27]
Macroseismic Intensity Shakemap of the Feb 07 2021 Davao del Sur Earthquake. It was first recorded as magnitude 6.3 by the Philippine Institute of Volcanology and Seismology, which later downgraded it to M w 6.1 at a shallow depth of 10 km.