# slmon — SeisComP Release documentation

6.9.0

# slmon

SeedLink monitor creating web pages

## Description

slmon collects waveform QC parameters from a configured seedlink Server and creates static HTML websites for their visualization. Station summeries and per-station channels views are available.

## Setup

1. Adjust the module configuration parameters of slmon to set the seedlink Server, the output directory for the created webpages and other parameters.

2. Create and adjust binding profiles and station bindings for slmon to activate the monitoring of the desired networks and stations.

3. Update the configuration of slmon

4. Start slmon. This step reads the QC parameters and creates the static webpage. The webpage is not automatically updated.

       seiscomp update-config
       seiscomp start slmon

5. Restart slmon in order to upate the webpage. The restart can be performed by a the regular system check scheduled by a crontab entry.

   The example below shows a crontab entry to update the webpage generated by slmon every 3 minutes:

       */3 * * * * /home/sysop/seiscomp/bin/seiscomp check slmon >/dev/null 2>&1

   Note

   The crontab entry can be generated and added automatically using the seiscomp script:

       seiscomp print crontab | crontab -

A comprehensive example for monitoring many stations of a large number of networks is provided by GEOFON at GFZ Potsdam, Germany. A simple example of a website create by slmon is given in the figures below.

Example of a website with the station summary created by slmon.

Example of a website with a per-station channel view created by slmon.

## Module Configuration

Note

slmon is a standalone module and does not inherit global options.

`etc/defaults/slmon.cfg`
`etc/slmon.cfg`
`~/.seiscomp/slmon.cfg`

title

  Default: `"SeedLink Monitor"`

  Type: string

  Title of the web page used as heading.

refresh

  Default: `180`

  Type: double

  Unit: s

  Refresh interval of the generated web page used by the browser. The interval should be similar to the interval for starting slmon. If empty, the web page must be manually refreshed from within the browser.

address

  Default: `127.0.0.1`

  Type: string

  Host of the Seedlink server to connect to. If the acquisition is running on one system nothing needs to be changed.

port

  Default: `18000`

  Type: int

  The port of the Seedlink server to connect to. If the acquisition is running on one system this port must match the configured local Seedlink port.

email

  Type: string

  e-mail address added to web pages.

wwwdir

  Default: `@ROOTDIR@/var/run/@NAME@`

  Type: string

  Output directory of the web pages.

icon

  Default: `http://www.gfz-potsdam.de/favicon.ico`

  Type: string

  Favicon URL of the web pages. Not mandatory.

linkname

  Default: `GEOFON`

  Type: string

  Name of Link shown in footer of web pages.

linkurl

  Default: `http://www.gfz-potsdam.de/geofon/`

  Type: string

  URL referred to by linkname in footer of web pages.

liveurl

  Default: `http://geofon.gfz-potsdam.de/waveform/liveseis.php?station=%s`

  Type: string

  URL to live seismograms. %s will be replaced by station name. Not mandatory.

## Bindings Parameters

group

  Default: `local`

  Type: string

  Defines the group of the station that is monitored.