A Tsunami is a series of sea waves commonly generated by under-the-sea earthquakes and whose heights could be greater than 5 meters. It is erroneously called tidal waves and sometimes mistakenly associated with storm surges. Tsunamis can occur when the earthquake is shallow-seated and strong enough to displace parts of the seabed and disturb the mass of water over it. Some natural signs of an approaching local tsunami include:
1) A felt earthquake.
2) Unusual sea level change: sudden sea water retreat or rise.
3) Rumbling sound of approaching waves. Continue reading
The link to the PHIVOLCS Earthquake Bulletins of latest seismic events in the Philippines is listed below. The event parameters (hypocenter, time and magnitude) are determined using incoming data from the Philippine National Seismic Network. The latest earthquakes that have been recorded are listed with their date and time underlined in blue. Intensity ratings are based on the PHIVOLCS Earthquake Intensity Scale. Continue reading
Earthquakes in the Philippines are classified into ten different intensity scales, with Intensity I being the lowest (weakest) measurable tremor, to Intensity 10 (the strongest). Because Philippines is a chain of islands located near the Pacific’s Ring of Fire, it’s a good idea to understand the intensity of quakes and be aware of possible tsunami prone areas. Continue reading