Definition

1. Noun:
   • Seismograph: A scientific instrument that detects, measures, and records the vibrations of the ground, such as those caused by earthquakes, volcanic activity, or explosions. It produces a graphical record called a seismogram.

Usage Examples

• Noun:
  • Các nhà khoa học sử dụng địa chấn ký để theo dõi hoạt động địa chấn. (Scientists use a seismograph to monitor seismic activity.)
  • Địa chấn ký ghi nhận một trận động đất mạnh ở ngoài khơi. (The seismograph recorded a strong earthquake offshore.)
  • Chiếc địa chấn ký cổ nhất thế giới được phát minh ở Trung Quốc. (The world's oldest seismograph was invented in China.)

Advanced Usage

• The term is used in technical and academic contexts within geology, seismology, and earth sciences. It refers specifically to the complete instrument system for detecting and recording ground motion.

Variants and Related Words

• Địa chấn học (n): Seismology - the scientific study of earthquakes and the propagation of elastic waves through the Earth.
• Seismogram (n): The visual record of ground motion produced by a seismograph.
• Seismometer (n): The internal sensor component of a seismograph that detects the ground's movement.

Synonyms

• Seismometer: Often used interchangeably in general contexts, though technically it is the sensing element.
• Earthquake recorder: A descriptive, non-technical synonym.

Related Terms

• Tâm chấn / Chấn tiêu (n): Hypocenter / Focus - the point within the Earth where an earthquake rupture originates.
• Tâm động đất (n): Epicenter - the point on the Earth's surface directly above the hypocenter.
• Độ Richter (n): Richter scale - a logarithmic scale for expressing the magnitude of an earthquake.

1. Seismograph