Recording seismic signals of large-scale natural earthquakes, capable of continuous operation for one year. Mainly used for the following research: lithosphere and asthenosphere structure, mantle dynamics, deep earth structure, source physics; Slow sliding, noise research, sub gravity waves, and tsunamis. Compared to short period seafloor seismometers, the SinOBS-BB broadband seafloor seismometer needs to be strengthened in the following aspects: low noise in the vertical channel, higher precision time system, large range recording (without shear waves), and longer working time.

Basic parameters:

Record time: more than 2 months (sample rate 500sps);

Working depth: the standard configuration is 6000 meters, the maximum can reach 12000 meters;

Clock accuracy: 5ppb

Data format: SEGY

Recovery mode: 1. Acoustic command release 2. Timed automatic release 3. Rising speed 45-60m/min

Seismometer Type:

Short period seismometer:

(1) Three-component seismometer, self-leveling;

(2) Frequency band width: 1-300Hz, or 4.5Hz natural frequency (optional);

(3) Sensitivity: 250V/(m/sec);

(4) Noise level: 100nm/sec;

(5) Dynamic range: 110dB;

(6) Weight: 0.92kg.

Data logger:

(1) At least 4 channels: 3 channels seismometer and 1 channel hydrophone;

(2) Anti-aliasing FIR filter;

(3) Sampling rate: 100, 200, 250, 500, 1000Hz;

(4)A/D conversion: 24Bit;

(5) Sampling rate setting of each channel;

(6) The dynamic range and noise level of the data logger cannot limit the sensor performance;

(7) Acquisition mode: pre-programmed time window, adjustable sampling rate;

(8) Scalable time synchronization that can be synchronized to other data loggers/systems.