Adds Rupture Mechanism class

The generation of the 3D rupture planes for characterising the finite rupture distances depends on the rupture mechanism (strike, dip and rake). As this information may be absent or incomplete, the mechanism itself is defined as a probability mass function, with multiple possibles mechanisms and their corresponding probabilities, and this is subsequently used to generate the probability density of source-to-site distances within the shakemap calculation. This MR implements an object for rupture mechanism distribution from no data, incomplete data and complete data.

shakyground2/earthquake.py

@@ -75,48 +75,48 @@ class Earthquake(object):
         date=None,
         time=None,
     ):
-    """
-    Initialize a new Earthquake object
+        """
+        Initialize a new Earthquake object
 
-    Args:
+        Args:
 
-    id:
-        Unique ID for the earthquake
-    lon:
-        Earthquake longitude in decimal degrees (-180 to 180)
-    lat:
-        Earthquake latitude in decimal degrees (-90, to 90)
-    hypo_depth:
-        Hypocentral depth (in km)
-    magnitude:
-        Earthquake magnitude
-    strike:
-        Strike of the rupture (in degrees from north)
-    dip:
-        Dip of the rupture (in degrees from horizontal)
-    rake:
-        Rake of the earthquake rupture in decimal degrees according to the
-        Aki & Richards (1980) convention (-180 to 180)
-    aspect:
-        Aspect ratio (length / width) of the rupture
-    mag_scaling_relation:
-        Magnitude scaling relation as instance of the BaseScalingRelation class or None.
-        Defaults to :class:`shakyground2.magnitude_scaling_relations.PEERScalingRelation`
-        when missing
-    upper_seismogenic_depth:
-        Upper seismogenic depth (in km)
-    lower_seismogenic_depth:
-        Lower seismogenic depth (in km)
-    surface:
-        Rupture surface as instance of :class:`openquake.hazardlib.geo.BaseSurface`, or None
-    hypocenter_position:
-        Hypocentre location within the rupture plane as a tuple of
-        (fraction of along strike length, fraction of down-dip width)
-    date:
-        Date of the earthquake (year, month, day) as datetime.date object
-    time:
-        Time of the earthquake (hour, minute, second) as datetime.time object
-    """
+        id:
+            Unique ID for the earthquake
+        lon:
+            Earthquake longitude in decimal degrees (-180 to 180)
+        lat:
+            Earthquake latitude in decimal degrees (-90, to 90)
+        hypo_depth:
+            Hypocentral depth (in km)
+        magnitude:
+            Earthquake magnitude
+        strike:
+            Strike of the rupture (in degrees from north)
+        dip:
+            Dip of the rupture (in degrees from horizontal)
+        rake:
+            Rake of the earthquake rupture in decimal degrees according to the
+            Aki & Richards (1980) convention (-180 to 180)
+        aspect:
+            Aspect ratio (length / width) of the rupture
+        mag_scaling_relation:
+            Magnitude scaling relation as instance of the BaseScalingRelation class or None.
+            Defaults to :class:`shakyground2.magnitude_scaling_relations.PEERScalingRelation`
+            when missing
+        upper_seismogenic_depth:
+            Upper seismogenic depth (in km)
+        lower_seismogenic_depth:
+            Lower seismogenic depth (in km)
+        surface:
+            Rupture surface as instance of :class:`openquake.hazardlib.geo.BaseSurface`, or None
+        hypocenter_position:
+            Hypocentre location within the rupture plane as a tuple of
+            (fraction of along strike length, fraction of down-dip width)
+        date:
+            Date of the earthquake (year, month, day) as datetime.date object
+        time:
+            Time of the earthquake (hour, minute, second) as datetime.time object
+        """
         self.id = id
         self.lon = valid.longitude(lon)
         self.lat = valid.latitude(lat)