Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 28-10-2022 and time 06:48:27 (Italy) in region 2 km S Santo Stefano di Magra (SP)

A magnitude ML 1.1 earthquake occured in region: 2 km S Santo Stefano di Magra (SP), on

  • 28-10-2022 04:48:27 (UTC)
  • 28-10-2022 06:48:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1440, 9.9220 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 5 21976 49299
Follo SP 5 6337 55636
Bolano SP 6 7813 63449
Podenzana MS 7 2180 65629
Lerici SP 8 10228 75857
Fosdinovo MS 8 4883 80740
Aulla MS 8 11263 92003
La Spezia SP 8 93959 185962
Ameglia SP 9 4365 190327
Castelnuovo Magra SP 9 8415 198742
Tresana MS 11 2044 200786
Ortonovo SP 12 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 13 2429 219958
Riomaggiore SP 15 1576 221534
Carrara MS 16 63133 284667
Pignone SP 16 565 285232
Licciana Nardi MS 17 4949 290181
Villafranca in Lunigiana MS 17 4770 294951
Rocchetta di Vara SP 18 703 295654
Borghetto di Vara SP 18 938 296592
Brugnato SP 19 1270 297862
Vernazza SP 19 848 298710
Fivizzano MS 19 7925 306635
Mulazzo MS 20 2424 309059
Bagnone MS 20 1887 310946

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 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)
84 Km SW of Reggio nell'Emilia (171345 inhabitants)
84 Km E of Genova (586655 inhabitants)
98 Km SW of Modena (184973 inhabitants)
99 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
Reviewed
Rev100 		ML 1.1 2022-10-28
04:48:27		 44.1442 9.9222 11 2022-10-28
05:04:03		 Sala Sismica INGV-Roma 111248141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-10-28 04:48:27 ± 0.11
Latitude 44.1442 ± 0.0072
Longitude 9.9222 ± 0.0075
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 111248141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 803
Semi-minor axis of confidence ellipse (meter) 531
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 182
Circular confidence region, given by single value of horizontal uncertainty (meter) 800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 93
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
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) 0.10612
Epicentral distance of station farthest from the epicenter (degree) 0.60704
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 111248141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-10-28 05:04:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.POPM.HHZ. 2022-10-28T04:48:48.17 0.6 undecidable manual S 99 67.377 50 0.01 46
IV.BDI.HHZ. 2022-10-28T04:48:44.31 0.6 undecidable manual S 99 54.4011 50 -0.38 44
IV.ERBM.EHE. 2022-10-28T04:48:43.74 0.6 undecidable manual S 52 49.5171 50 0.36 45
GU.CARD.HHZ. 2022-10-28T04:48:41.93 0.3 undecidable manual S 106 46.5201 50 -0.65 62
GU.GRAM.HHZ. 2022-10-28T04:48:40.66 0.6 undecidable manual S 16 40.0266 50 -0.19 47
IV.MSSA.HHZ. 2022-10-28T04:48:39.64 0.3 undecidable manual S 301 37.4292 50 -0.51 66
IV.PII.HHE. 2022-10-28T04:48:39.76 0.6 undecidable manual P 134 67.1772 50 0.33 44
MN.VLC.HHZ. 2022-10-28T04:48:39.64 0.6 undecidable manual S 87 37.0296 50 -0.4 45
GU.POPM.HHZ. 2022-10-28T04:48:38.94 0.6 undecidable manual P 99 67.377 50 -0.52 42
IV.ERBM.EHE. 2022-10-28T04:48:37.40 0.1 undecidable manual P 52 49.5171 50 0.7 80
IV.BDI.HHZ. 2022-10-28T04:48:37.90 1.0 undecidable manual P 99 54.4011 50 0.44 22
GU.MAIM.HHE. 2022-10-28T04:48:37.73 0.1 undecidable manual P 119 52.1034 50 0.62 82
GU.CARD.HHZ. 2022-10-28T04:48:36.18 0.6 undecidable manual P 106 46.5201 50 -0.06 48
MN.VLC.HHZ. 2022-10-28T04:48:35.02 0.6 negative manual P 87 37.0296 50 0.24 47
GU.GRAM.HHZ. 2022-10-28T04:48:35.54 0.6 undecidable manual P 16 40.0266 50 0.29 46
GU.SARM.EHE. 2022-10-28T04:48:34.98 0.1 undecidable manual P 83 38.3283 50 0 98
GU.EQUI.HHZ. 2022-10-28T04:48:34.54 0.6 undecidable manual S 82 18.5703 120 -0.44 46
GU.FIVI.HNE. 2022-10-28T04:48:34.86 0.6 undecidable manual S 57 19.4694 118 -0.39 47
IV.MSSA.HHZ. 2022-10-28T04:48:34.77 0.1 undecidable manual P 301 37.4292 50 -0.07 97
GU.FIVI.HNE. 2022-10-28T04:48:32.13 0.1 undecidable manual P 57 19.4694 118 0.12 99
IV.PLMA.HHZ. 2022-10-28T04:48:32.75 0.6 undecidable manual S 208 11.7771 132 -0.32 48
GU.EQUI.HHZ. 2022-10-28T04:48:31.97 0.6 positive manual P 82 18.5703 120 0.12 50
IV.PLMA.HHZ. 2022-10-28T04:48:30.90 0.1 undecidable manual P 208 11.7771 132 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PLMA.HHN. ML:1.6 0.00046350000000000004 0.14 AML other m 2022-10-28T04:48:32.90
IV.PLMA.HHE. ML:1.3 0.0002165 0.08 AML other m 2022-10-28T04:48:32.90
GU.EQUI.HHE. ML:0.9 0.0000666 0.1 AML other m 2022-10-28T04:48:35.00
GU.EQUI.HHN. ML:0.8 0.000051131845 0.0768 AML other m 2022-10-28T04:48:35.08
MN.VLC.HHN. ML:0.0 0.000026049999999999996 0.48 AML other m 2022-10-28T04:48:39.72
MN.VLC.HHE. ML:0.0 0.000028899999999999998 0.14 AML other m 2022-10-28T04:48:40.16
IV.MSSA.HHE. ML:1.5 0.00011999999999999999 0.1 AML other m 2022-10-28T04:48:40.36
IV.MSSA.HHN. ML:1.3 0.00006914999999999999 0.68 AML other m 2022-10-28T04:48:41.33
GU.CARD.HHE. ML:1.3 0.0000606 0.14 AML other m 2022-10-28T04:48:42.10
GU.CARD.HHN. ML:1.2 0.00005115 0.14 AML other m 2022-10-28T04:48:42.27
GU.POPM.HHE. ML:1.1 0.00002005 0.42 AML other m 2022-10-28T04:48:48.48
GU.POPM.HHN. ML:1.2 0.0000286 0.16 AML other m 2022-10-28T04:48:49.23
GU.GRAM.HHE. ML:0.9 0.00002973161 0.08 AML other m 2022-10-28T04:48:42.92
GU.GRAM.HHN. ML:1.1 0.00004259003 0.0608 AML other m 2022-10-28T04:48:42.54
IV.BDI.HHE. ML:0.8 0.0000139376355 0.2176 AML other m 2022-10-28T04:48:44.67
IV.BDI.HHN. ML:0.6 0.000012227363 0.2208 AML other m 2022-10-28T04:48:45.85
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