Rebuilt from the ground up: live spectrum, automatic recordings, event detection, USGS earthquakes on a globe, and a Mac control center for every device you own.
iSeismometer turns your iPhone or iPad into a seismograph. Set it on a table, tap the desk, and watch the ground move. You will be surprised how sensitive your phone is.
It has been doing that since the App Store opened in 2008, when it reached #1 in Education in Japan, Austria, Finland, and Greece. Version 1.7 is a complete rebuild: faster, clearer, and finally a real instrument.
LIVE SEISMOGRAPH
• Three axes at up to 100 samples per second, drawn like a strip-chart recorder
• Scroll back through up to an hour of history while it keeps recording
• Gravity filter with a real corner frequency, so slow tilt disappears and earthquakes stay
• Live spectrum: see the frequency of footsteps, a washing machine, or a passing truck at a glance
• Dark mode and a full iPad layout
EVENT DETECTION
• A seismologist's STA/LTA trigger flags every tremor with its peak acceleration, duration, and dominant frequency
• Three sensitivity levels, from "only real shakes" to "every footstep"
• Events are shaded on the traces and listed so you can jump straight to them
RECORDINGS
• Every session is saved automatically as compact raw data, split into hourly files
• Browse by day, open any recording, scrub to its events, and see its spectrum
• Export CSV, or pick up the raw files in the Files app and in Finder
• Keep them for a day, a week, a month, or forever
WAS THAT AN EARTHQUAKE?
• Live USGS feed on a globe, filtered by time window and magnitude
• Tap a quake for its depth, time, and the official USGS page
STREAM TO YOUR MAC
• Open iSeismometer on a Mac on the same Wi-Fi and your phone finds it by itself
• The Mac shows every device streaming to it side by side, with its own recordings and event detection
• Reconnects on its own after the screen locks, the network drops, or the Mac restarts
Made for fun and for learning. A phone carries a MEMS accelerometer, not a broadband seismometer, so it feels footsteps and trucks far better than distant earthquakes. Put it on a solid floor, plug it in, keep the screen awake, and you have a home seismic station. iSeismometer is not a substitute for official earthquake early warnings or emergency alerts.
Questions and ideas: info@objectgraph.com
"This is a novelty app but one that also helps you learn something new... one of those things that is very captivating once you've looked at it once." — The Independent Guide to the iPhone 3GS
The application is excellent and is one of the few great apps that allow you to export information over UDP with low-pass filtering. However it has two fatal flaws. The first being that it crashes back to the main screen after running for about 24 hours. I’m writing an earthquake monitoring app for various locations in my house and having to check each iPhone/iPod around the house to make sure they’re still running is a pain. Secondly the app needs to be updated for the iPhone 5 screen size and resolutions. Otherwise I’d give it 5 stars.
iOS 11 update ASAP!
TheGadgetinator
iOS 11 update ASAP!This is a nice app but what it really needs is the ability to utilize the iPhone accelerometer to detect earthquakes and automatically share that data to the cloud and/or the USGS. Only when enough similar readings are detected from a certain region within a narrow timeframe would the data be considered legitimate and then be pushed back out to the map for all users to view. The app could also be active only at certain times of the day/night that the user defines. As well as only be active when connected to pre-defined wifi networks. Such as Home or work. Another option would be to only take accelerometer reading when it is plugged into power (such as when on your night stand or connected to a computer USB). The app could also use the iPhone GPS to disable sensor reading when moving. As well as only record seismic data when the app detects the iPhone is laying flat on its back. Another option would be to disable the seismic sensor data output when a face is detected with the front facing camera. Requiring the app to be running in the foreground would also further prevent false readings. This could easily, quickly, and cheaply create a huge network of seismographs around the world.Needs to be able to run in background (Multitasking). Needs to record magnetometer data as well.
Good free app!
sandbox32
I love this app! However, there are several improvements that could be made. First, the X, Y, and Z lines should be different colors to avoid confusion. Also, all the buttons crowding the bottom of the screen should be merged into a single button called “Menu,” which would bring up a pane with those tabs. And the features should be explained more, I still have no idea what the last 3 seconds screen does. Anyway, great work! I look forward to future updates.
Incredible! You can report earthquakes
Lesliemak
This is amazing. Just like a real pocket sized seismograph! If it's in your pocket during an earthquake, hopefully you can turn it on, set it on the floor and click the Report An Earthquake button. Talk about social network reporting. That would be so cool to have, not only verbal reports of what it felt like, but real graphic reports live from the scene! You guys should get an award for this. Plus it has a link to contribute to earthquake relief funds. Great job!
• 1.7.1: the app now speaks German, French, Spanish and Japanese. Connect to your Mac by address on networks that block Bonjour; the Mac shows its address and port under Receiver
iSeismometer has been rebuilt from the ground up.
• Smooth, fast charts that scroll back through up to an hour of history while recording continues
• Live spectrum with adjustable range, window, and averaging
• Event detection: tremors are flagged with peak acceleration, duration, and dominant frequency
• Automatic recordings, browsable by day, with CSV export and Files app access
• Gravity filter with a selectable corner frequency
• USGS earthquakes on a globe, with time and magnitude filters
• Mac app redesigned as a control center for every device streaming to it
• Auto-reconnect to your Mac, charging awareness, and a keep-awake option
• Dark mode, iPad layout, and a new launch screen
Version 1.7.1
The developer, ObjectGraph LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
