en Julio de 1880 en la Isla de Luzon," is one of the best that has been published from a descriptive point of view. He personally covered the whole territory in which these earthquakes had been most violent, and hence was able to determine, with the precision possible in such cases, the meizoseismic areas of the three destructive earthquakes that took place from July 14 to 21. Reconstruction of the city was undertaken by civil engineers who adopted the traditional combination formula, while adapting this to the adverse seismic conditions. It was recommended that the ground floor of buildings should be constructed using a timber framework with multiple ties and that the external walls should be brick-built. Heavy roofing made from tiles was discouraged in favor of the new lighter galvanized iron. See also List of earthquakes in the Philippines List of historical earthquakes Notes Earthquakes in the Philippines Luzon Luzon earthquakes History of Metro Manila Luzon earthquakes Earthquake clusters, swarms, and sequences Luzon earthquakes