All about AT2 Files

The AT2 file type is primarily associated with SeismoSignal.

AT2	File extension: AT2
	File type:	data file

What is an AT2 file?

AT2 files mostly belong to SeismoSignal. AT2 files are mostly used for recording acceleration time series data. They are created by tools like SeismoSignal to capture ground motion data during seismic events.
These files store numerical records that track the changes in acceleration over time.
If you open an AT2 file, first check its source, because it could be one of several specialized types:

Seismic data files from earthquake monitoring systems

Bank data files used in Austrian financial systems

Tax return files used by Canadian tax software such as TurboTax

Travel expense reports for SAP or Amadeus Pro systems

For example, if your file is from a seismic instrument, refer to the SeismoSignal product page for viewing and analysis details.
FilExt.com tip: Since the data structure is custom, using the intended application is essential for correct interpretation and editing of the file.

How to open an AT2 file

You need a suitable software like SeismoSignal to open an AT2 file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your AT2 file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a AT2 file directly in the browser:. Just drag the file onto this browser window and drop it.

Online AT2 Text Viewer

Choose your .at2 file to view

or drag and drop it here

Online File Viewer

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How to extract texts from AT2 files or capture a screenshot to PDF, JPG, DOCX, TXT, ...

1. To do this, click the button "Choose your .at2 file to view" on this page.
2. After your file is opened in browser,
3. click "Save as..." in the menu.
4. Then choose the file format (e.g. JPG, PDF, DOCX, TXT, ...) you want.
5. Download the converted file.

AT2 file format:

To find out what program is needed to open AT2 files, you need to determine the file format. The file format can be deduced from the file extension and the signature. However, different programs can use the same file extension, and file extensions can be assigned incorrectly. Exact knowledge of the format is therefore important in order to solve problems occurring in files. Our analysis of the AT2 files produces the following result:

Files with the AT2 extension are quite widely used. This file type predominantly uses a uniform format. But the following two file formats are common:

• 75% of all AT2 files start with the bytes PEER crucial for this file format. These files are plain text, which means they can be viewed with any text editor such as Windows Editor, Nano for Linux, and TextEdit for macOS. AT2 files are between 39 KB and 180 KB in size. The file type was developed 10 years ago and is still in use today. Certain words are almost always found in the files, such as PEER NGA STRONG MOTION DATABASE RECORD, NPTS and ACCELERATION TIME SERIES IN UNITS OF G. These files are attributed to lomap, impvall, chichi, northr, kocaeli, landers, sfern and duzce.
• 9% of all AT2 files use the same file format, which can be identified by the letters "052" at the beginning. If you open these files in a text editor, you can view and read the content yourself. A typical file size is 100 bytes. Several words can almost always be found in the files, e.g. AT-BK18_19 and Herr.

All the rest of the AT2 files (16%) have different formats, frequently e.g. config, ALANNA and File. Tagged as imperial, manjil, valley, parkf, coyotelk, chuetsu, clucano, abbar, tabas or prog. If you want to find out what your AT2 file contains, drag and drop it onto this page.