Year

Anomaly

Coordinates

Swarm region (number of events)

1997

Mar -Fall

−7.76N, −10.49S, −69.96E,−72.96W

Western Brazil, Peru border (3)

2001

Apr-Fall

−16.21N, −34.23S, −61.14E,−72.04W

Jujuy-Argentina, Southern Bolivia, Chile/Bolivia (20)

2005

Mar-(Fall)

−16.94N, −27.78S, −60.58E,−68.38W

Jujuy-Argentina, Chile/Bolivia, Peru/Brazil border (17)

2007

May-(Fall)

8.49N, −52.21S, −14.03E,−119.15W

Chile/Argentina, Western Brazil, S. Peru, Jujuy (13)

2007

Aug-winter

−18.07N, −27.15S,−64.48E,−68.03W

S Bolívia, Argentina border, Jujuy Argentina (13)

2010

Feb-Summer

−18.07N, −25.15S,−64.36E,−69.46W

Chile/Argentina, South Bolivia, Jujuy, (15)

2015

Feb -Summer

−17.6N, −26.74S, −63.86E,−68.15W

(Jujuy, Salta) Argentina, Southern Bolivia (13)

2015

Nov-Spring

−7.58N, −11.39S,−69.56E,−72.33W

Peru/Brazil border, Western Brazil (19)

2016

Oct-Nov Spring

−18.07N, −26.36S,−65E,−68W

Chile/Argentina border, South Bolivia (23)

2017

May-Jul Fall-Winter

−18.07N, −26.36S,−65E,−68.6

Chile/Argentina border, S.Bolivia, Salta, Jujuy, Mendoza (65)

2017

Dec Summer

−18.54N, −25.06S,−65.37E,−68.97W

Bolivia (Central, South), Jujuy, Salta, Mendoza (Argentina) (13)

2018

Apr-Jul Fall-Winter

−18.07, −27.15S,−64.48E,−69.03W

Jujuy, Salta, Chile/Argentina border, South Bolivia (41)

2019

Dec-Summer

−19.12N, −25.30S,−64.13E,−70.1W

Chile/Argentina, Jujuy (11)