TANGSHAN EARTHQUAKE

Pun Hoi Yan 4C(25)

Cheung Hau Ying 4C(14)

TANGSHAN EARTHQUAKE:

▪Happened in 28July,1976

▪The deadliest earthquake in modern times

▪Magnitude 7.8,Focus 12km

▪Affect 14 cities(eg.Beijing,Tianjin)

▪the largest earthquake of the 20th

century by death toll

▪Aftershock

LOCATION

NOWADAYS TANGSHAN

(1)WHY IT CAUSE GREAT CASUALTIES?

It was happened at midnight(3am)

People were asleep and were

guardless(can't escape rapidly)

Caused huge casualties(242,769death,16.4thousand

injured)

Lasted 23 seconds

(2)WHY IT CAUSE GREAT CASALTIES? Frequency of happening earthquake was low

Not many earthquake-proof designs buildings

(low awareness)

Alluvial soil was not stable

TECTONIC PLATES SLIDING

EFFECTS OF TANGSHAN EARTHQUAKE: ▪Aftershocks(magnitude 5-5.5)

▪Serious casualties(242,769death,16.4thousand injured)

▪Great economic loss

People who were waiting for rescuing were died

(death toll increase further)

Destruction:78%factories,80%water pump

station,93%resident buildings

→indirectly ended the Chinese revolution

SITUATION OF RELIEVE WORK: ▪Discontinous communication system,water,electrical power etc.

▪Capital limited

➢Relief the victims in a difficult situation

1.China bankruptcy problem

2.Didn't receive foreign countries help

∴The result of the relieve work were not favorably and effective.

PREVENTION & IMPROVEMENT: Monitoring and warning systems

→ To give time for evacuation

Hazard-proof designs

→To provide protection

Land-use planning

→To avoid risky development

Education and drills →To raise awareness of these hazards

Rescue system

→To reduce the number of deaths

Seismographs

→To measure seismic waves

Satellites

→To detect slight movements in the ground

PREVENTION & IMPROVEMENT:

THE END THANKYOU