Eroded sandstone in Ischigualasto, San Juan

Photo:M.Bustos · CC BY-SA 4.0 · Wikimedia Commons

Earthquakes in San Juan and Mendoza Today

Above the flat-slab segment of the Nazca plate, crustal faults in the Andean foothills of San Juan and Mendoza produce Argentina's most damaging earthquakes. The 1944 San Juan and 1977 Caucete earthquakes both struck this region.

Danger Level (72h)

72-hour composite hazard forecast

61%

Recent Quakes (14d)

Recorded in the selected 14d period

Max Magnitude (14d)

Largest earthquake in the selected 14d period

M4.8

Tectonic Profile

Seismotectonic hazard assessment, structural exposure & historical context

Associated Faults3

Click to locate on map

Regional PopulationLandScan

4.7M

Living within seismically active radius (~300 km)

Building VulnerabilityModerate

Moderate

Mixed construction stock with regional engineering standards

Tectonic Setting

Convergent Margin

High Hazard

Active fault boundary with frequent seismicity

MAG4.8

Most Significant Earthquake (14d)PAGER green

30 km NW of San Juan (Argentina)

7h ago· Depth 109 km

Exposed Population (MMI6+)0

Estimated Fatalities0

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3.5

Off the coast of Valparaíso (46 km W, Chile)

CSN 3.5+1

20 km•33m ago

3.1

Off the coast of Valparaíso (45 km W, Chile)

CSN 3.1+1

22 km•56m ago

4.2

Off the coast of Valparaíso (45 km W, Chile)

CSN 4.2+1

26 km•1h ago

3.2

62 km SW of San Juan (Argentina)

EMSC

117 km•6h ago

4.8

30 km NW of San Juan (Argentina)

USGS 4.8+3

108.9 km•7h ago

3.0

Off the coast of Valparaíso (35 km N, Chile)

CSN 3.0+1

28 km•11h ago

3.1

164 km NW of Tucumán (Argentina)

EMSC

10 km•11h ago

3.5

163 km NW of San Juan (Argentina)

CSN 3.5+1

20 km•20h ago

3.3

31 km SW of Coquimbo (Chile)

CSN 3.3+1

27 km•1d ago

3.4

120 km NW of Catamarca (Argentina)

EMSC

184 km•1d ago

3.0

53 km N of La Serena (Chile)

CSN 3.0+1

55 km•1d ago

3.0

43 km W of Valparaíso (Chile)

CSN 3.0+1

24 km•1d ago

4.2

108 km N of La Serena (Chile)

CSN 4.2+1

30 km•2d ago

3.1

Off the coast of Coquimbo (154 km NW, Chile)

CSN 3.1+1

41 km•3d ago

3.8

84 km W of San Juan (Argentina)

EMSC 3.8+1

118.4 km•3d ago

3.2

110 km NW of Catamarca (Argentina)

EMSC

169 km•3d ago

3.1

43 km SE of Linares (Chile)

CSN 3.1+1

119 km•3d ago

4.1

44 km E of Vallenar (Chile)

CSN 4.1+2

94 km•3d ago

4.4

80 km W of San Juan (Argentina)

GEOFON 4.4+1

104.7 km•3d ago

3.3

60 km SE of Santiago (Chile)

CSN 3.3+1

12 km•3d ago

4.4

Off the coast of Valparaíso (53 km SW, Chile)

CSN 4.4+2

24 km•4d ago

3.0

200 km N of Copiapó (Chile)

CSN 3.0+1

75 km•4d ago

3.1

171 km W of San Juan (Argentina)

CSN 3.1+1

118 km•4d ago

3.5

131 km N of La Serena (Chile)

CSN 3.5+1

26 km•4d ago

3.0

85 km W of San Juan (Argentina)

EMSC

116 km•4d ago

3.6

Off the coast of Copiapó (134 km SW, Chile)

CSN 3.6+1

34 km•4d ago

3.1

Off the coast of Copiapó (184 km N, Chile)

CSN 3.1+1

36 km•4d ago

3.4

82 km E of San Juan (Argentina)

EMSC

10 km•4d ago

3.2

137 km W of San Juan (Argentina)

EMSC

94 km•4d ago

AI Risk:

LIVE

Nov 15, 11:38:02 AM

29/ 29

29/ 29Quakes

Seismic Activity

Every recorded earthquake in this area — filter by time range and sort by time or severity.

Hover or tap a point for details.Current Rolling Risk: M4.6

Shallow (<35 km)Intermediate (35–70 km)Deep (>70 km)

Regional Volcanism & Monitored Vents

Active vents and Holocene volcanic structures within the monitored boundary (San Juan and Mendoza) · 7

Last eruptionVolcano & TypeDetailsSummit

1987

Tupungatito

Stratovolcano•5.7 km•Chile-Argentina

GVP

5.7 km

1960

San Jose

Stratovolcano•6.1 km•Chile-Argentina

GVP

6.1 km

1917

Tinguiririca

Stratovolcano•4.3 km•Chile

GVP

4.3 km

1912

Maipo

Caldera•5.3 km•Chile-Argentina

GVP

5.3 km

—

Palomo

Stratovolcano•4.9 km•Chile

GVP

4.9 km

—

Atuel, Caldera del

Caldera•5.2 km•Argentina

GVP

5.2 km

—

Risco Plateado

Stratovolcano•5.0 km•Argentina

GVP

5.0 km

Catalogue: Smithsonian Institution, Global Volcanism Program.Volcanoes of the World