Learning Objective/s:
1. Locate the epicenter of an
earthquake using the triangulation
method.
2. Evaluate students’ understanding
through a hands-on activity.
CONCEPT DIGEST:
The triangulation method is a
technique used in seismology to
determine the location of an
earthquake's epicenter. It relies on
data collected from three or more
seismograph stations that have
recorded the arrival times of seismic
waves produced by the earthquake.
Task 1
(Individual task)
Study the given three
seismograph data. Copy and
complete the table on the next
slide.
Task 1
Jolo
Study the given three
seismograph tracing. Complete
the table on the next slide.
Siquijor
Puerto
Princesa
Task 1
Study the given three
seismograph tracing. Complete
the table on the next slide.
Seismograph
Task
1
How to read seismograph data
Study the given three
seismograph
tracing.
Complete
P-WAVES
S-WAVES
the table on the next slide.
Jolo
Siquijor
Task 1
Study the given three
seismograph tracing. Complete
the table on the next slide.
Puerto Princesa
Use the
provided
distance-time
graph in
determining
the location
of the
epicenter.
Task 2
(group task)
Locate the epicenter of the
earthquake by plotting the
gathered data on the provided
Philippine map.
Listen
carefully to
the
instructions.
Listen
carefully to
the
instructions.
Listen
carefully to
the
instructions.
GUIDE QUESTIONS:
Q1. Where is the epicenter of this
hypothetical earthquake?
Q2. What difficulty will you
encounter if you only have data from
two recording stations?
Q3. What do you think is the
importance of determining the
epicenter of an earthquake?