Seismograph: Vibration Meter

Seismograph is the most accurate seismograph, vibration meter, and earthquake detector for Android. Read live ground vibration, peak acceleration, and a Richter-style magnitude in seconds.

Whether you live in a quake zone, monitor machine or structural vibration, or just want to log the next tremor, Seismograph turns your phone into a portable seismic monitor that works fully offline.

▶ MAIN FEATURES
• Live seismogram with a real-time 3-axis waveform
• Ground vibration shown in mm/s or g
• Richter-style magnitude estimate (Micro to Great)
• Peak event log with PGA (peak ground acceleration)
• Adjustable sensitivity for your surface
• Alarm threshold with audio + vibration alert
• Recording and history of past events
• Export your readings and event log
• Dark mode for night monitoring
• Works fully offline, no account required

▶ HOW TO USE
1. Place your phone flat on a solid surface to monitor.
2. Tap Calibrate once while the surface is still.
3. Watch the live seismogram and vibration gauge.
4. Set an alarm threshold to be alerted on strong shaking.
5. Review the peak event log with magnitude and PGA.

▶ WHO USES SEISMOGRAPH
• Earthquake-aware residents tracking tremors at home
• Engineers checking machine and structural vibration
• Curious users logging traffic or construction shaking
• Science teachers and students learning seismology
• Makers and DIY builders testing rigs and mounts

Seismograph uses your phone's built-in accelerometer to estimate ground motion. It is a fun and useful monitoring tool, but it is not a substitute for official seismic networks or professional instruments.