ExpTech Studio

Real-time earthquake monitoring for Taiwan

ExpTech Studio designs seismometers, builds apps and desktop software, and runs a public API that delivers earthquake data as it happens.

See our products Read the API docs Sign in to the console

TREM-net: 200+ stations in Taiwan
Station intensity: Updated every second
Interfaces: HTTP · SSE

Station intensityIllustration

Intensity

CWA scale

7
6強
6弱
5強
5弱
4
3
2
1
0

弱 lower · 強 upper

What we do

ExpTech Studio is a team with a mix of skills. We focus on real-time earthquake monitoring in Taiwan and use seismic data and visualization to provide earthquake information and data services.

Real-time monitoring
Since 2022 we have built TREM-net, the TREM seismic network, with 200+ stations covering every county and city in Taiwan. Seismometers we design ourselves record ground motion on three axes, and intensity at each station updates every second.
Earthquake early warning
We relay earthquake early warnings from Taiwan's Central Weather Administration (CWA). Seismic waves take seconds to tens of seconds to reach you, and the alert goes out in that window. Our TREM system also computes its own warnings, TREM EEW, from TREM-net observations. TREM EEW is not official information: under the Meteorological Act it is provided only to specific users and is not issued to the general public. The CWA's releases always prevail.
Open data and API
Earthquake reports and real-time station data are available over an HTTP API and SSE real-time streams. Developers can connect directly and build their own tools.

Products

A disaster-information app, desktop software and seismometers, all designed and built in-house.

Product docs

Mobile app

Android
iOS

DPIP

Disaster Prevention Information Platform

Weather and earthquakes, in your pocket

From CWA earthquake early warnings and live rainfall to weather and hazard maps, DPIP brings the information that matters into one mobile app, so you can see what is changing around you sooner.

No ads
Battery-friendly
Real-time alerts

Real-time alerts: Alerts from several sources, pushed to you the moment an earthquake happens.
Earthquake info: Earthquake reports, live stations and seismic waves as they spread.
Hazard maps: Live rainfall, radar, satellite and typhoon information in one place.
24-hour forecast: The latest forecast, so you can plan your day.

DPIP home screen: a radar map and current weather for Zhongzheng District, Taipei

Seismometer

ESP32
Wi-Fi 2.4 GHz
USB Type-C

ES Series Seismometers

A low-cost, high-sensitivity three-axis MEMS seismometer. It connects over Wi-Fi with NTP time sync and plugs into a computer over USB-C. Made for teaching, research, and seismic networks.

Anyone can buy one and join TREM-net.

ES-Net specifications

Sample rate: 50 SPS
Resolution: 16-bit
Range: ±2 g
Bandwidth: DC–25 Hz
Weight: 36.8 g
NTP time error: ±10 ms

The ES-Net seismometer: a black case with the ESP-32 module visible through an opening — **ES-Net**BasicThree-axis MEMS accelerometer; no display or buzzer7 × 3.5 × 2.4 cm

The ES-Pro seismometer: a black ExpTech case with an OLED screen showing intensity and a waveform — **ES-Pro**With displayBuilt-in OLED display and buzzer; shows intensity and waveforms live7 × 5.45 × 3.4 cm

Desktop app

Windows
macOS
Linux
Web

TREM-Lite

A desktop earthquake monitor. It shows live intensity, CWA earthquake early warnings, and earthquake reports, and keeps running in the background. A web version needs no install.

Voice announcements, system notifications, picture-in-picture and a tray icon
Open source (AGPL-3.0)

Companion software for ES

Windows
macOS
Linux

QuakeWatch-Pro

Companion software for ES series seismometers. Connect over USB-C and see the waveforms live.

Geo-redundancy

Every station sends its data to two core sites at the same time: Tainan in Taiwan and Tokyo in Japan. Each site computes on its own, so if one goes down, the other keeps producing real-time intensity.

Dual uplink: Each station is connected to Tainan (primary link) and Tokyo (backup link) at once. Both sites receive the data; nothing waits for a failure to switch over.
Independent computing: Both core sites compute real-time intensity and waveforms on their own, then sync across sites with de-duplication so no reading is processed twice.
Automatic failover: The database replicates synchronously and promotes the standby automatically if the primary fails. A three-site quorum in Tainan, Tokyo and Taipei elects the primary.
Two entry points: Developers reach the API and SSE streams through load balancers in Taipei and Kaohsiung.

Geo-redundancy covers real-time earthquake data (stations, intensity, waveforms, earthquake reports). Weather data and radar, satellite and wind tiles are currently served from the Tainan site only.

See the full architecture

Core site
Load balancer
Quorum member
Station

ExpTech API

The ExpTech API serves earthquake reports and real-time station (RTS) data over HTTP and SSE real-time streams. It runs on several servers, and you can choose which node to connect to. Endpoints, data formats, and usage rules are in the API docs. All data requires attribution, and some of it (such as TREM-net data) is for non-commercial use only.

Quickstart API docs

GET/api/v2/eq/reportFetch earthquake reports

cURL

curl https://api.core.exptech.dev/api/v2/eq/report

JavaScript

const res = await fetch(
  "https://api.core.exptech.dev/api/v2/eq/report",
);
const data = await res.json();

Nodes

Autoapi.core.exptech.devAssigned by DNS
TNN-1api.core-tnn1.exptech.dev
TYO-1api.core-tyo1.exptech.dev

Blog

We publish incident reports (RCAs) and development notes.

Posts are in Chinese.

All posts

Partners

Thanks to these partners for equipment, computing resources and technical help.

Community and contact

Questions or ideas? Find us on Discord or email [email protected].

Also onThreads Instagram YouTube

For official earthquake and weather information, refer to the Central Weather Administration (CWA).