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m  single  single     length  a  25 ◦
                     solution.  solution.  for  solution  consistently  >30  or  a  in  a  in  25 ◦  consistently  fractures  combined  Tensile  in  ≥  sd  measurements


                     composite  constrained  single-event  Single-event  event  2.5  four  breakout  length  Breakouts  ≥  sd  with  four  tensile  m  <30  well.  single  orientations  with  well  hydrofrac  depth  m  <100



                     Single  Poorly  <  M  than  Less  oriented  combined  well.  well  than  Less  oriented  with  a  in  fracture  single  Single  at
                 D
                       motions  assignment)  several  of  composites  breakouts  m  30  tensile  and  25 ◦  combined  single  a  in  25 ◦ .  <  orientation  deepest  valid.  well



                     solution  first  by  on  based  Average  distinct  and/or  25 ◦  >  length  distinct  <  sd  with  a  m  30  orientations  sd  <  20 ◦  hydrofrac  depth,  with  assumed  hydrofrac  two  single  a  in


                     Single-event  (constrained  often  only,  author’squality  2.5).  ≥  (M  well-constrained  2.0)  ≥  (M  four  least  <  sd  with  combined  four  least  fractures  encompassing  >  length  Hydrofac  with  well  Distinct  change  measurements  or  One  orientations



                 C                        At                  At  with  a
                     single-event  average  or  4.5)  well-constrained  ≥  (M  solutions  first  from  methods  other  tensor  or modeling,  breakout  with  well  single  combined  m  tensile  well  single  encompassing  m  100  >  hydrofrac  well  single  a  Hydrofrac  well  single  a  25 ◦  <




                     Well-constrained  ≥  (M  solution  two  single-event  determined  and  motions  moment  wave-form  inversion)  distinct  six  least  a  in  zones  and/or  20 ◦  ≤  100  >  length  distinct  six  least  a  in fractures  and  20 ◦  ≤  length combined  more  or  in orientations  20 ◦ .  <  sd  in orientations  sd  <  20 ◦





                 B        of  3.5)  (e.g.  At  sd             At   sd  a     Three  with  m.  with
                              event  ≥  M  breakout  with  of  more  12 ◦  ≤  with  or  m,  well  >300  more
                       more
                          in
                     formal  or  solutions  one  events  well  combined  Average  or  geographic  combined  sd  and  tensile  well  encompassing  300  single  depth  or  two  geographic  12 ◦

                     or  four  least  other  distinct  single  and/or  m.  two  with  m  distinct  single  a  of  hydrostatic  a  in  12 ◦  hydrofrac  for  ≤  sd
             system  P-axis  of  inversion  single-event  geographic  proximity(at  4.0,  more  a  in  12 ◦  >300  in breakouts  close  in  proximity  >300  more  in fractures  and  12 ◦  depth  more  or  orientations  ≤  sd  of Average  orientations  close  in  proximity,


             ranking  A  Average  close  ≥  M  3.0)  or  Ten  zones  ≤  sd  length  wells  length  Tenor  ≤  sd  vertical  more  Four  with  wells


             Quality  focal               breakouts              fractures   fractures



             6.1.    Earthquake  mechanisms                   Drilling-induced  tensile
             Table                        Wellbore                           Hydraulic
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