present-day stress field vs faults: some examples in italy...shmin trend congruent with the...

a b

c

d

Sv>SHmax>Shmin

SHmax>Sv>Shmin

SHmax>Shmin>Sv

Gela

GelaThrust Front

Foredeep Hyblean

Foreland IonianSea

A e g a d i a nI s l a n d s

Malta Escarpm

ent

Etna

Palermo

Trapani

Catania

IBL1 IBL3IBL2

Siracusa

Messina

Agrigento

Caltanissetta

Malta

Pantelleria

Ustica A e o l i a n

A r c

F r o n t

Ca l ab r i a n A r c

K a b y l i a nT h r u

s t

37N

38N

13E 15E0 50km

Shmin orientation

breakout data

fault data

overcoring data

A

B

C

D

E

earthquake data

Data quality

Stress regimenormal faultingthrust faultingstrike-slip faultingstress unknown

normal faultingthrust faultingstrike-slip faulting

Calabrian-Peloritani UnitMio-Pleistocene syntectonicdeposits

Pleistocene depositsPlio-Quaternary volcanic rocks

Iblean UnitPlatform UnitMiocene FlyschSicilide Unit

LegendTotal dataN N

Deep interval

bre

ako

ut

ori

enta

tio

ns

Total data

bre

ako

ut

zon

es

0

1000

2000

3000

4000

5000

6000

Alb

urno

- C

erva

tiA

pulia

Lago

negr

o II

m

A P U L I A F O R E L A N DB R A D A N I C F O R E D E E P

P OL L

I NO

R AN G

E

Vallo di Diano

Sele plain

Salerno

IRPINIA FAULT

Matera

POTENZA

IONIAN SEA

TYRRHENIAN SEA

1990

1980

19982002

1996

199115611826

1857

1708

1836

1273

1694 1910

19301361 1731

989

17321456

19621702

1851

18531980

375

6279

1836951

1560

Earthquake

Tectonic regime:

Normal fault Thrust fault

normal faultingstrike slip faulting

C

D

Shmin directionStress data

InstrumentalSeismicity

Historical

Data quality

A-B

Fault

Breakout

M