EarthQuakes
Group 2
EARTH
QUAKE
(also known as a quake, tremor or
temblor) any sudden shaking of the
ground caused by the passage of
seismic waves through Earth's rocks.
Seismic waves are produced when
some form of energy stored in Earth's
crust is suddenly released, usually
when masses of rock straining against
one another suddenly fracture and
"slip."
Where do earthquakes form?
Most of the quakes take place in these regions: CircumPacific Belt, Mid-Atlantic Ridge, and Alpide Belt.
Earth's major earthquakes occur mainly in belts that
coincide with tectonic plates' margins.
LEGEND:
Alpide Belt
Circum-Pacific Belt
Mid-Atlantic Ridge
Why is the
Philippines prone to
Earthquakes?
Published in Reuters, the Philippines is prone to
natural disasters and is located on the
seismically active Pacific "Ring of Fire".
ABRA 2022 Earthquake
July-October 2022
Why and How did the
2022 Abra Earthquake
Happened?
The seismicity in Abra and its vicinity can be attributed
to the presence of several active faults in the region
such as the Abra River Fault, West Ilocos Fault System,
Bangui Fault, Naglibacan Fault, Manmanoc Fault, as
well as the offshore presence of the Manila Trench,
west of the province.
Earthquake
Hazards and Mitigation
Landslides - When an earthquake occurs, the
transmission of seismic waves can cause shaking
and vibration of ground surface.
Hazards
Ground shaking - Ground shaking is a
term used to describe the vibration of
the ground during an earthquake.
Liquefaction - Liquefaction occurring beneath
buildings and other structures can cause major
damage during earthquakes.
Tsunami - Most tsunami are caused by large
earthquakes on the sea floor when slabs of rock
move past each other suddenly, causing the
overlying water to move.
• People are advised to exercise caution around
structures that are clearly damaged, show symptoms
of deterioration, or pose an unattended risk of
collapsing
• The appropriate course of action is to seek
guidance from the relevant Municipal/City
Engineering Office for dwellings and other structures
with obvious damage.
• The best course of action is preparedness.
• During earthquakes, panic-inducing rumors are
easily circulated. Please refrain from disseminating
information from unverified and dubious sources.
Mitigation
(What should be done by the affected
communities?)
References:
https://www.britannica.com/science/earthquake-geology/Shallow-intermediate-and-deep-foci )
https://www.phivolcs.dost.gov.ph/index.php/news/16049-primer-on-the-25-october-2022-magnitude-6-4earthquake-event-of-the-2022-northwestern-luzon-earthquake-series?
cookie_f1c2eb3d29444b35e29064d3b05e858e=accepted
https://www.youtube.com/watch?v=_r_nFT2m-Vg
https://crew.org/earthquake-information/earthquakehazards/#:~:text=These%20include%20ground%20shaking%2C%20landslides,%2C%20hazardous%20spills%2C
%20and%20fires.
https://www.weready.org/earthquake/index.php?
option=com_content&view=article&id=24&Itemid=42#:~:text=Mitigation%20of%20Earthquake%20Damage%2
0and%20Casualties&text=The%20most%20common%20(and%20effective,and%20stabilize%20hitherto%20unst
able%20ground.
https://temblor.net/earthquake-insights/two-quakes-philippines-july-october-2022-14746/
https://www.foxweather.com/learn/7-facts-about-earthquakes