Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 03-12-2021 and time 16:37:44 (UTC) in region 8 km NE Zocca (MO)

A magnitude ML 1.8 earthquake occured in region: 8 km NE Zocca (MO), on

  • 03-12-2021 16:37:44 (UTC)
  • 03-12-2021 17:37:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.3840, 11.0880 at 28 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
Zocca MO 8 4719 4719
Marzabotto BO 11 6779 11498
Vergato BO 11 7639 19137
Guiglia MO 11 3931 23068
Savignano sul Panaro MO 12 9177 32245
Vignola MO 12 25353 57598
Monte San Pietro BO 12 10982 68580
Marano sul Panaro MO 13 5060 73640
Sasso Marconi BO 13 14735 88375
Castel d'Aiano BO 13 1906 90281
Valsamoggia BO 14 30561 120842
Grizzana Morandi BO 15 3916 124758
Zola Predosa BO 16 18770 143528
Montese MO 17 3353 146881
Spilamberto MO 18 12621 159502
Castelvetro di Modena MO 18 11185 170687
Monzuno BO 19 6328 177015
Casalecchio di Reno BO 19 36327 213342

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SW of Bologna (386663 inhabitants)
32 Km SE of Modena (184973 inhabitants)
47 Km SE of Carpi (70699 inhabitants)
50 Km W of Imola (69797 inhabitants)
50 Km SE of Reggio nell'Emilia (171345 inhabitants)
52 Km N of Pistoia (90315 inhabitants)
56 Km N of Prato (191150 inhabitants)
64 Km W of Faenza (58541 inhabitants)
66 Km SW of Ferrara (133155 inhabitants)
70 Km N of Firenze (382808 inhabitants)
70 Km N of Scandicci (50609 inhabitants)
76 Km NE of Lucca (89046 inhabitants)
76 Km SE of Parma (192836 inhabitants)
78 Km W of Forlì (117913 inhabitants)
85 Km E of Massa (69479 inhabitants)
86 Km E of Carrara (63133 inhabitants)
88 Km NE of Viareggio (62467 inhabitants)
89 Km W of Ravenna (159116 inhabitants)
92 Km NE of Pisa (89158 inhabitants)
95 Km SW of Rovigo (51867 inhabitants)
96 Km W of Cesena (96758 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 1.8 2021-12-03
16:37:44		 44.3838 11.0875 29 2022-03-30
13:04:33		 Bollettino Sismico Italiano INGV 100275551
Reviewed
Rev100 		ML 1.8 2021-12-03
16:37:44		 44.385 11.0818 30 2021-12-03
16:49:19		 Sala Sismica INGV-Roma 98097951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-03 16:37:44 ± 0.28
Latitude 44.3838 ± 0.0135
Longitude 11.0875 ± 0.0151
Depth (km) 29 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100275551

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1368
Semi-minor axis of confidence ellipse (meter) 809
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 189
Circular confidence region, given by single value of horizontal uncertainty (meter) 1370.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.08633
Epicentral distance of station farthest from the epicenter (degree) 0.48294
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 100275551
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-28 15:48:48

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 98097951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-03 16:49:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BDI.HHE. 2021-12-03T16:38:02.10 0.6 undecidable manual S 228 52.9026 113 0.08 49
GU.POPM.HHZ. 2021-12-03T16:38:00.38 0.6 undecidable manual S 215 45.9207 116 0.06 49
IV.FNVD.HHZ. 2021-12-03T16:37:55.45 0.6 undecidable manual S 173 24.1536 135 -0.1 52
IV.ERBM.EHN. 2021-12-03T16:37:54.37 0.6 undecidable manual P 274 53.6019 112 -0.35 46
IV.BDI.HHE. 2021-12-03T16:37:54.54 0.3 undecidable manual P 228 52.9026 113 -0.08 74
IV.ZCCA.HHZ. 2021-12-03T16:37:53.73 0.6 undecidable manual S 247 9.5793 160 0.3 51
GU.GSCL.HHN. 2021-12-03T16:37:53.53 0.6 undecidable manual P 265 39.8268 120 0.73 42
IV.SEI.HHN. 2021-12-03T16:37:53.50 0.6 undecidable manual P 149 42.4242 118 0.34 47
GU.POPM.HHZ. 2021-12-03T16:37:53.91 0.6 undecidable manual P 215 45.9207 116 0.28 47
IV.MOCL.EHZ. 2021-12-03T16:37:52.89 0.6 undecidable manual P 170 42.7239 118 -0.3 48
IV.VISG.HHZ. 2021-12-03T16:37:52.05 0.3 undecidable manual P 128 35.0427 124 -0.13 75
IV.RAVA.EHE. 2021-12-03T16:37:52.82 0.6 undecidable manual P 3 41.3253 119 -0.19 48
IV.MTRZ.HHZ. 2021-12-03T16:37:52.21 0.3 undecidable manual P 106 27.8499 131 0.9 60
IV.FNVD.HHZ. 2021-12-03T16:37:50.43 0.1 undecidable manual P 173 24.1536 135 -0.45 96
IV.ZCCA.HHZ. 2021-12-03T16:37:49.32 0.1 positive manual P 247 9.5793 160 -0.34 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ZCCA.HNN. ML:1.9 0.00041549999999999996 1.72 AML other m 2021-12-03T16:37:54.01
IV.ZCCA.HHN. ML:1.9 0.00041500000000000006 1.72 AML other m 2021-12-03T16:37:54.01
IV.ZCCA.HNE. ML:1.9 0.00045 0.22 AML other m 2021-12-03T16:37:54.09
IV.ZCCA.HHE. ML:1.9 0.00044999999999999993 0.22 AML other m 2021-12-03T16:37:54.09
IV.FNVD.HHE. ML:1.8 0.0002370003 1.8464 AML other m 2021-12-03T16:37:55.94
IV.FNVD.HHN. ML:1.9 0.00028649999999999997 1.36 AML other m 2021-12-03T16:37:56.12
GU.POPM.HHN. ML:1.7 0.00011424999999999999 0.16 AML other m 2021-12-03T16:38:00.99
IV.VISG.HHE. ML:0.9 0.000023727201 0.7424 AML other m 2021-12-03T16:38:01.12
GU.POPM.HHE. ML:1.6 0.00009232023 0.1664 AML other m 2021-12-03T16:38:01.73
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