diff --git a/README.md b/README.md
index 495a2c6..aac4f55 100644
--- a/README.md
+++ b/README.md
@@ -17,10 +17,23 @@ Create build directory, configure, and build:
     make
 
 this should create an executable in the build directory. 
-There is an example parameter file 'example.conf' in the main directory
 
 If you run into problems with CMake not being able to find your local FFTW3 or HDF5 installation, it is best to give the path directly as
 
     FFTW3_ROOT=<path> HDF5_ROOT=<path> ccmake ..
 
-make sure to delete previous files generated by CMake before reconfiguring like this.
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+make sure to delete previous files generated by CMake before reconfiguring like this.
+
+## Running
+
+There is an example parameter file 'example.conf' in the main directory. Possible options are explained in it, it can be run
+as a simple argument, e.g. from within the build directory:
+
+     ./monofonic ../example.conf
+
+If you want to run with MPI, you need to enable MPI support via ccmake. Then you can launch in hybrid MPI+threads mode by 
+specifying the desired number of threads per task in the config file, and the number of tasks to be launched via
+
+     mpirun -np 16 ./monofonic <path to config file>
+     
+It will then run with 16 tasks times the number of threads per task specified in the config file.
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