Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 18-03-2017 and time 11:28:16 (UTC) in region 1 km N Tiglieto (GE)

A magnitude ML 1.2 earthquake occured in region: 1 km N Tiglieto (GE), on

  • 18-03-2017 11:28:16 (UTC)
  • 18-03-2017 12:28:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.5320, 8.6220 at 11 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Tiglieto GE 1 546 546
Rossiglione GE 5 2779 3325
Urbe SV 5 700 4025
Campo Ligure GE 6 2955 6980
Masone GE 8 3679 10659
Cassinelle AL 10 914 11573
Molare AL 10 2181 13754
Belforte Monferrato AL 11 515 14269
Morbello AL 12 402 14671
Sassello SV 12 1777 16448
Ovada AL 12 11477 27925
Cremolino AL 12 1086 29011
Tagliolo Monferrato AL 13 1581 30592
Prasco AL 14 521 31113
Lerma AL 14 869 31982
Mele GE 14 2725 34707
Ponzone AL 14 1051 35758
Casaleggio Boiro AL 14 372 36130
Trisobbio AL 15 655 36785
Grognardo AL 15 259 37044
Arenzano GE 15 11519 48563
Rocca Grimalda AL 16 1512 50075
Cogoleto GE 16 9172 59247
Morsasco AL 16 679 59926
Mornese AL 16 737 60663
Carpeneto AL 16 977 61640
Malvicino AL 17 85 61725
Montaldo Bormida AL 17 664 62389
Mioglia SV 17 526 62915
Cavatore AL 17 291 63206
Visone AL 17 1194 64400
Montaldeo AL 17 265 64665
Cartosio AL 17 747 65412
Silvano d'Orba AL 18 1988 67400
Pontinvrea SV 18 847 68247
Stella SV 18 3009 71256
Orsara Bormida AL 18 424 71680
Castelletto d'Orba AL 18 2047 73727
Bosio AL 19 1227 74954
Pareto AL 19 554 75508
Parodi Ligure AL 19 715 76223
Varazze SV 19 13251 89474
Melazzo AL 20 1325 90799

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km NE of Savona (61345 inhabitants)
28 Km W of Genova (586655 inhabitants)
42 Km S of Alessandria (93943 inhabitants)
53 Km SE of Asti (76202 inhabitants)
84 Km SW of Pavia (72576 inhabitants)
86 Km E of Cuneo (56081 inhabitants)
89 Km S of Vigevano (63310 inhabitants)
91 Km SE of Moncalieri (57294 inhabitants)
96 Km SE of Torino (890529 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.2 2017-03-18
11:28:16		 44.5323 8.622 11 2018-01-10
09:55:04		 Bollettino Sismico Italiano INGV 50244991
Reviewed
Rev100 		ML 1.3 2017-03-18
11:28:16		 44.5317 8.6272 11 2017-03-18
11:44:58		 Sala Sismica INGV-Roma 42594481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-18 11:28:16 ± 0.1
Latitude 44.5323 ± 0.0072
Longitude 8.6220 ± 0.0076
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 50244991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 784
Semi-minor axis of confidence ellipse (meter) 423
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 339
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.62953
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 42594481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-18 11:44:58

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 50244991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-09-26 11:20:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.T1299.EHZ. 2017-03-18T11:30:15.41 3.0 undecidable manual Sg 8.66 0
BA.PZUN.HHZ. 2017-03-18T11:29:56.27 3.0 positive manual Pn 0.18 0
IV.T1212.EHZ. 2017-03-18T11:29:54.42 3.0 undecidable manual Sn -7.18 0
IV.TRIV.HHZ. 2017-03-18T11:29:44.37 3.0 undecidable manual Pg 8.04 0
IV.VITU.HHZ. 2017-03-18T11:29:42.95 3.0 undecidable manual Pn 1.03 0
IV.LIK.EHZ.01 2017-03-18T11:29:31.86 3.0 negative manual Pn 1.13 0
MN.AQU.HHZ. 2017-03-18T11:29:26.23 3.0 undecidable manual Pg 4.14 0
IV.PP3.EHZ. 2017-03-18T11:29:21.56 3.0 undecidable manual Pg 4.33 0
IV.T1214.EHZ. 2017-03-18T11:29:15.22 3.0 undecidable manual Pn -2.15 0
IV.MABI.HHZ. 2017-03-18T11:28:51.51 3.0 undecidable manual Pg -0.06 0
IV.NDIM.HNZ. 2017-03-18T11:28:44.75 3.0 positive manual Pg -2.59 0
IV.EUCT.HNZ. 2017-03-18T11:28:41.02 3.0 undecidable manual S -1.92 0
GU.GBOS.HHZ. 2017-03-18T11:28:37.41 0.3 undecidable manual S 243 69.8745 50 -0.51 61
GU.GORR.HHZ. 2017-03-18T11:28:33.69 0.6 undecidable manual S 81 53.6019 50 0.12 45
GU.CANO.HHZ. 2017-03-18T11:28:32.00 0.6 undecidable manual S 220 47.2194 50 0.13 46
GU.ROTM.HHZ. 2017-03-18T11:28:30.19 0.6 undecidable manual S 329 41.0256 50 -0.03 47
GU.GBOS.HHZ. 2017-03-18T11:28:29.36 0.3 undecidable manual P 243 69.8745 50 0.38 63
IV.QLNO.HHZ. 2017-03-18T11:28:27.58 0.3 undecidable manual S 224 31.8459 50 -0.17 70
GU.RNCA.HHZ. 2017-03-18T11:28:26.72 0.6 undecidable manual S 105 26.9508 50 0.28 46
GU.GORR.HHZ. 2017-03-18T11:28:26.09 0.6 undecidable manual P 81 53.6019 50 -0.39 43
GU.CANO.HHZ. 2017-03-18T11:28:25.67 0.1 undecidable manual P 220 47.2194 50 0.18 91
GU.ROTM.HHZ. 2017-03-18T11:28:24.67 0.3 undecidable manual P 329 41.0256 50 0.13 70
IV.QLNO.HHZ. 2017-03-18T11:28:23.31 0.1 undecidable manual P 224 31.8459 50 0.19 93
GU.RNCA.HHZ. 2017-03-18T11:28:22.06 0.1 undecidable manual P 105 26.9508 50 -0.3 92
GU.PCP.HHZ. 2017-03-18T11:28:20.98 0.6 undecidable manual S 279 6.1938 151 -0.17 49
GU.PCP.HHZ. 2017-03-18T11:28:19.36 0.1 undecidable manual P 279 6.1938 151 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.PCP.HHN. ML:1.4 0.00040800000000000005 0.24 AML other m 2017-03-18T11:28:21.19
GU.RNCA.HHN. ML:1.0 0.00004813064 0.5984 AML other m 2017-03-18T11:28:26.26
IV.QLNO.HHE. ML:1.0 0.0000458900195 0.9184 AML other m 2017-03-18T11:28:27.72
GU.CANO.HHN. ML:1.5 0.00009302027 0.2976 AML other m 2017-03-18T11:28:31.83
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download