Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 28-10-2022 and time 11:03:44 (Italy) in region 2 km SE Santo Stefano di Magra (SP)

A magnitude ML 1.7 earthquake occured in region: 2 km SE Santo Stefano di Magra (SP), on

  • 28-10-2022 09:03:44 (UTC)
  • 28-10-2022 11:03:44 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1430, 9.9260 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
Santo Stefano di Magra SP 2 9360 9360
Vezzano Ligure SP 3 7356 16716
Arcola SP 3 10607 27323
Sarzana SP 4 21976 49299
Follo SP 6 6337 55636
Bolano SP 6 7813 63449
Podenzana MS 7 2180 65629
Lerici SP 7 10228 75857
Fosdinovo MS 8 4883 80740
Aulla MS 8 11263 92003
La Spezia SP 9 93959 185962
Castelnuovo Magra SP 9 8415 194377
Ameglia SP 9 4365 198742
Tresana MS 11 2044 200786
Ortonovo SP 11 8277 209063
Portovenere SP 12 3630 212693
Riccò del Golfo di Spezia SP 13 3698 216391
Calice al Cornoviglio SP 13 1138 217529
Beverino SP 14 2429 219958
Carrara MS 16 63133 283091
Riomaggiore SP 16 1576 284667
Licciana Nardi MS 16 4949 289616
Pignone SP 17 565 290181
Villafranca in Lunigiana MS 17 4770 294951
Rocchetta di Vara SP 18 703 295654
Borghetto di Vara SP 19 938 296592
Fivizzano MS 19 7925 304517
Brugnato SP 19 1270 305787
Vernazza SP 19 848 306635
Bagnone MS 20 1887 308522
Mulazzo MS 20 2424 310946

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km E of La Spezia (93959 inhabitants)
16 Km W of Carrara (63133 inhabitants)
21 Km NW of Massa (69479 inhabitants)
40 Km NW of Viareggio (62467 inhabitants)
57 Km NW of Lucca (89046 inhabitants)
61 Km NW of Pisa (89158 inhabitants)
73 Km NW of Livorno (159219 inhabitants)
80 Km SW of Parma (192836 inhabitants)
83 Km W of Pistoia (90315 inhabitants)
83 Km SW of Reggio nell'Emilia (171345 inhabitants)
85 Km E of Genova (586655 inhabitants)
97 Km SW of Modena (184973 inhabitants)
98 Km W of Prato (191150 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 1.7 2022-10-28
09:03:44		 44.1432 9.9257 11 2024-03-01
15:28:00		 Bollettino Sismico Italiano INGV 111831061
Reviewed
Rev100 		ML 1.7 2022-10-28
09:03:44		 44.1395 9.9303 11 2022-10-28
09:12:39		 Sala Sismica INGV-Roma 111251421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-10-28 09:03:44 ± 0.11
Latitude 44.1432 ± 0.0063
Longitude 9.9257 ± 0.0075
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 111831061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 736
Semi-minor axis of confidence ellipse (meter) 400
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 193
Circular confidence region, given by single value of horizontal uncertainty (meter) 740.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.83367
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 111831061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-22 09:42:56

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 111251421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-10-28 09:12:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
MN.SENA.HHZ. 2022-10-28T09:05:38.60 3.0 undecidable manual Sg 11.49 0
IV.GIUL.HHZ. 2022-10-28T09:05:35.37 3.0 undecidable manual Sg 12.18 0
IX.COL3.HHZ.02 2022-10-28T09:05:23.02 3.0 undecidable manual Pg 19.209999 0
IV.SAMA.EHZ. 2022-10-28T09:05:22.78 3.0 undecidable manual Sg 11.57 0
IV.MCRV.HHZ. 2022-10-28T09:05:19.20 3.0 undecidable manual Pg 17.52 0
IV.IFOR.HHZ. 2022-10-28T09:05:06.72 3.0 negative manual Pg 13.71 0
IT.RMMM.HGZ. 2022-10-28T09:05:03.82 3.0 undecidable manual Sn -3.08 0
CH.GIMEL.HHZ. 2022-10-28T09:04:44.51 3.0 positive manual Pn 5.56 0
SL.LJU.BHZ. 2022-10-28T09:04:43.22 3.0 undecidable manual Pn 0.66 0
IV.NRCA.HHZ. 2022-10-28T09:04:28.50 3.0 undecidable manual Pn 0.75 0
IV.NARO.HHZ. 2022-10-28T09:04:25.90 3.0 negative manual Pg 7.47 0
ST.OZOL.EHZ. 2022-10-28T09:04:23.11 3.0 undecidable manual Pn -0.37 0
GU.GORR.HHZ. 2022-10-28T09:04:06.84 0.6 undecidable manual S 316 71.8725 50 0.15 45
IV.PII.HHZ. 2022-10-28T09:04:05.78 0.6 undecidable manual S 134 66.8775 50 0.43 43
GU.MAIM.HHZ. 2022-10-28T09:04:00.65 0.6 undecidable manual S 119 51.8037 50 -0.69 40
IV.CRMI.HHZ. 2022-10-28T09:04:00.51 0.3 undecidable manual P 114 92.5407 50 -0.17 65
GU.CARD.HHZ. 2022-10-28T09:03:59.19 0.6 undecidable manual S 106 46.2204 50 -0.64 42
GU.GRAM.HHZ. 2022-10-28T09:03:58.55 0.6 undecidable manual S 16 40.0266 50 0.35 46
IV.PII.HHZ. 2022-10-28T09:03:57.17 0.3 undecidable manual P 134 66.8775 50 0.45 64
GU.GORR.HHZ. 2022-10-28T09:03:57.69 0.3 undecidable manual P 316 71.8725 50 0.2 67
IV.MSSA.HHZ. 2022-10-28T09:03:56.67 0.3 undecidable manual S 301 37.7289 50 -0.89 57
MN.VLC.HHZ. 2022-10-28T09:03:56.88 0.6 undecidable manual S 87 36.741 50 -0.42 45
GU.MAIM.HHZ. 2022-10-28T09:03:54.69 0.3 undecidable manual P 119 51.8037 50 0.28 68
GU.CARD.HHZ. 2022-10-28T09:03:53.68 0.3 undecidable manual P 106 46.2204 50 0.15 71
IV.MSSA.HHZ. 2022-10-28T09:03:52.14 0.1 negative manual P 301 37.7289 50 -0.09 97
GU.GRAM.HHZ. 2022-10-28T09:03:52.93 0.3 undecidable manual P 16 40.0266 50 0.34 69
GU.FIVI.HNN. 2022-10-28T09:03:52.27 0.3 undecidable manual S 56 19.2696 119 -0.28 72
MN.VLC.HHZ. 2022-10-28T09:03:52.28 0.1 positive manual P 87 36.741 50 0.21 95
GU.EQUI.HHZ. 2022-10-28T09:03:51.77 0.6 undecidable manual S 82 18.2706 120 -0.49 46
IV.PLMA.HHZ. 2022-10-28T09:03:50.06 0.6 undecidable manual S 209 11.877 132 -0.38 48
GU.EQUI.HHZ. 2022-10-28T09:03:49.28 0.1 undecidable manual P 82 18.2706 120 0.12 100
GU.FIVI.HNN. 2022-10-28T09:03:49.52 0.1 undecidable manual P 56 19.2696 119 0.19 98
IV.PLMA.HHZ. 2022-10-28T09:03:48.30 0.1 positive manual P 209 11.877 132 0.19 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLMA.HHN. ML:2.3 0.00202 0.12 AML other m 2022-10-28T09:03:50.17
IV.PLMA.HHE. ML:1.9 0.00089185105 0.1024 AML other m 2022-10-28T09:03:50.23
GU.EQUI.HHE. ML:1.7 0.000422 0.1 AML other m 2022-10-28T09:03:52.33
GU.EQUI.HHN. ML:1.5 0.00025993829999999997 0.0768 AML other m 2022-10-28T09:03:52.41
MN.VLC.HHN. ML:1.6 0.0001495 1.86 AML other m 2022-10-28T09:03:57.05
MN.VLC.HNN. ML:1.6 0.0001482105 1.8592 AML other m 2022-10-28T09:03:57.99
IV.MSSA.HHN. ML:2.0 0.000354 0.1 AML other m 2022-10-28T09:03:57.28
MN.VLC.HHE. ML:1.7 0.000177 0.36 AML other m 2022-10-28T09:03:57.49
MN.VLC.HNE. ML:1.6 0.00015899999999999996 0.36 AML other m 2022-10-28T09:03:57.31
IV.MSSA.HHE. ML:2.2 0.00063788365 0.096 AML other m 2022-10-28T09:03:57.67
GU.CARD.HHE. ML:2.1 0.000365 0.16 AML other m 2022-10-28T09:03:59.44
GU.GRAM.HHN. ML:1.8 0.00020050000000000002 0.42 AML other m 2022-10-28T09:03:59.47
GU.GRAM.HHE. ML:1.7 0.00015433195 0.1792 AML other m 2022-10-28T09:03:59.69
GU.CARD.HHN. ML:2.0 0.0002635 0.14 AML other m 2022-10-28T09:03:59.60
GU.MAIM.HHE. ML:0.9 0.0000223591 0.1792 AML other m 2022-10-28T09:04:01.66
GU.MAIM.HHN. ML:1.2 0.00003674989 0.1984 AML other m 2022-10-28T09:04:01.76
IV.PII.HHE. ML:1.6 0.00007195 0.4 AML other m 2022-10-28T09:04:06.56
IV.PII.HHN. ML:1.7 0.00008099999999999999 0.24 AML other m 2022-10-28T09:04:07.50
GU.GORR.HHN. ML:1.5 0.000050544825 0.2432 AML other m 2022-10-28T09:04:08.64
GU.GORR.HHE. ML:1.4 0.00004729142 0.16 AML other m 2022-10-28T09:04:08.70
IV.CRMI.HHN. ML:1.3 0.000019524569999999997 0.3392 AML other m 2022-10-28T09:04:15.41
IV.CRMI.HHE. ML:1.0 0.000009393557 0.3648 AML other m 2022-10-28T09:04:18.01
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