Live global earthquake monitor ·
USGS data
How current is the earthquake data?
Tremr queries the USGS GeoJSON feed every five minutes. Most earthquakes appear within a few minutes of detection, though remote or complex events may take up to 20 minutes to be processed and published by USGS. The "Last Updated" timestamp in the stats bar shows exactly when the feed was last refreshed.
Why does the data sometimes change after an earthquake?
USGS earthquake information is initially published as a preliminary estimate based on the first seismograph readings available. As more seismometers around the world report in, scientists revise the magnitude, depth, and location to improve accuracy. A magnitude initially reported as M4.8 may later be revised to M5.1 or M4.6. Tremr always displays the most current USGS data.
What do the different time ranges show?
The Past Hour feed shows only the most recent events and updates most frequently. Past 24 Hours, Past 7 Days, and Past 30 Days pull from progressively larger USGS feeds that include all recorded earthquakes for each period. All feeds include every earthquake USGS has recorded above M0 — typically thousands of events per day worldwide.
Why are there so many small earthquakes?
Earth's crust is in constant motion. The USGS detects roughly 20,000 earthquakes per year — about 55 per day — though most are too small to feel. The majority of events on Tremr are micro earthquakes below M2.0, detectable only by sensitive instruments. This constant low-level activity is entirely normal and not a sign of increased risk.
What is the difference between magnitude and intensity?
Magnitude measures the energy released at the earthquake source — it is a single number describing the size of the event regardless of where you are. Intensity describes the shaking felt at a specific location and varies with distance, local geology, and building type. A M6.0 earthquake has one magnitude but very different intensities — strong shaking near the epicentre, barely perceptible motion far away.
What does depth mean?
Depth refers to how far below the Earth's surface the earthquake's focus (hypocenter) is located. Shallow earthquakes (0–70 km) typically cause more surface damage because seismic energy has less material to travel through before reaching the surface. Deep earthquakes (below 300 km) can be detected across vast distances but rarely cause significant surface damage.
What is the Ring of Fire?
The Ring of Fire is a belt of intense seismic and volcanic activity encircling the Pacific Ocean — running along the coasts of North and South America, across Alaska and Japan, and down through Southeast Asia to New Zealand. It follows the boundaries of several major tectonic plates and accounts for roughly 90% of the world's earthquakes. It is clearly visible on Tremr's map as a near-constant arc of earthquake dots.
How does Near Me work?
When you tap Near Me, Tremr requests permission to access your device's location via your browser. If you allow it, the list filters to earthquakes within the radius you have set in the Menu. Your location is processed entirely on your device and is never sent to our servers.
Why do some earthquakes disappear from the list?
Tremr shows only earthquakes within the selected time window. An earthquake in the Past Hour list will no longer appear once more than 60 minutes have passed. Switch to a longer time range — Past 24 Hours or Past 7 Days — to see older events.
Can I share a specific earthquake?
Yes. Tap any earthquake to open the detail panel, then use the Share button at the bottom. On mobile, this opens your device's native share sheet. On desktop, the link is copied to your clipboard. The shared link opens tremr.app directly to that earthquake's detail panel.
Can I get notifications for earthquakes?
Tremr Alerts is currently in development. Tap Get Alerts in the header to join the early access waitlist — you will be notified by email when it launches. Planned features include significant earthquake alerts near your location and custom magnitude thresholds delivered directly to your browser.
Is Tremr free?
Yes. Tremr is and always will be free to use. The site is supported by advertising.