Earthquake with magnitude of ML 1.4 on date 27-10-2021 and time 04:44:40 (Italy) in region 1 km E Polinago (MO)

A magnitude ML 1.4 earthquake occured in region: 1 km E Polinago (MO), on

  • 27-10-2021 02:44:40 (UTC)
  • 27-10-2021 04:44:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.351, 10.739 at 19 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Polinago MO 1 1672 1672
Lama Mocogno MO 5 2734 4406
Pavullo nel Frignano MO 8 17383 21789
Palagano MO 8 2194 23983
Serramazzoni MO 9 8282 32265
Montefiorino MO 9 2203 34468
Prignano sulla Secchia MO 10 3747 38215
Montecreto MO 11 940 39155
Sestola MO 14 2508 41663
Frassinoro MO 14 1926 43589
Toano RE 15 4463 48052
Riolunato MO 15 712 48764
Fanano MO 17 2989 51753
Castellarano RE 18 15232 66985
Montese MO 19 3353 70338
Pievepelago MO 19 2222 72560
Guiglia MO 20 3931 76491
Baiso RE 20 3315 79806

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Modena (184973 inhabitants)
40 Km S of Reggio nell'Emilia (171345 inhabitants)
49 Km NW of Pistoia (90315 inhabitants)
50 Km S of Carpi (70699 inhabitants)
51 Km W of Bologna (386663 inhabitants)
59 Km NE of Massa (69479 inhabitants)
59 Km NE of Lucca (89046 inhabitants)
59 Km NE of Carrara (63133 inhabitants)
60 Km NW of Prato (191150 inhabitants)
60 Km SE of Parma (192836 inhabitants)
66 Km NE of Viareggio (62467 inhabitants)
75 Km NW of Scandicci (50609 inhabitants)
76 Km NE of Pisa (89158 inhabitants)
77 Km NW of Firenze (382808 inhabitants)
77 Km E of La Spezia (93959 inhabitants)
78 Km W of Imola (69797 inhabitants)
88 Km SW of Ferrara (133155 inhabitants)
91 Km W of Faenza (58541 inhabitants)
95 Km NE of Livorno (159219 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.4 2021-10-27
02:44:40
44.351 10.7388 19 2021-10-27
02:56:50
Sala Sismica INGV-Roma 97011271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-27 02:44:40 ± 0.25
Latitude 44.3510 ± 0.0099
Longitude 10.7388 ± 0.0126
Depth (km) 19 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97011271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1094
Semi-minor axis of confidence ellipse (meter) 347
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) 1090
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.64751
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 97011271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-27 02:56:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CARD.HHZ. 2021-10-27T02:44:54.32 0.3 undecidable manual S 210 0.3732 105 0.3 69
IV.FNVD.HHN. 2021-10-27T02:44:53.24 0.3 undecidable manual S 124 0.3301 107 0.44 68
IV.PII.HHZ. 2021-10-27T02:44:53.02 0.1 undecidable manual P 194 0.6475 97 0.22 89
GU.POPM.HHZ. 2021-10-27T02:44:52.24 0.6 undecidable manual S 178 0.3058 109 0.12 48
IV.BDI.HHZ. 2021-10-27T02:44:52.45 0.6 undecidable manual S 200 0.3058 109 0.34 46
GU.SARM.EHZ. 2021-10-27T02:44:52.18 0.6 undecidable manual S 236 0.2941 110 0.4 46
IV.MSSA.HHZ. 2021-10-27T02:44:52.10 3.0 undecidable manual P -0.26 0
GU.MAIM.HHZ. 2021-10-27T02:44:51.26 3.0 undecidable manual P 0
GU.GRAM.HHE. 2021-10-27T02:44:50.71 0.1 undecidable manual P 286 0.5009 100 0.38 89
GU.CARD.HHZ. 2021-10-27T02:44:47.92 0.1 undecidable manual P 210 0.3732 105 -0.28 93
IV.FNVD.HHN. 2021-10-27T02:44:47.11 0.1 undecidable manual P 124 0.3301 107 -0.38 91
IV.BDI.HHZ. 2021-10-27T02:44:46.82 0.1 undecidable manual P 200 0.3058 109 -0.27 94
GU.SARM.EHZ. 2021-10-27T02:44:46.90 0.1 undecidable manual P 236 0.2941 110 0 100
GU.POPM.HHZ. 2021-10-27T02:44:46.48 0.1 undecidable manual P 178 0.3058 109 -0.62 86
GU.GSCL.HHZ. 2021-10-27T02:44:46.91 0.6 undecidable manual S 270 0.1079 142 -0.29 48
IV.ZCCA.HHZ. 2021-10-27T02:44:45.65 0.6 positive manual P 90 0.17 127 0.63 45
GU.GSCL.HHZ. 2021-10-27T02:44:44.15 0.1 positive manual P 270 0.1079 142 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GSCL.HHE. ML:1.4 0.000168 0.28 AML other m 2021-10-27T02:44:47.67
GU.GSCL.HHN. ML:1.2 0.0001047 0.42 AML other m 2021-10-27T02:44:48.46
IV.ZCCA.HHN. ML:1.5 0.000207 0.48 AML other m 2021-10-27T02:44:51.57
IV.ZCCA.HHE. ML:1.4 0.000144 0.38 AML other m 2021-10-27T02:44:51.64
GU.POPM.HHE. ML:1.2 5.755E-5 0.48 AML other m 2021-10-27T02:44:52.57
IV.BDI.HHN. ML:1.6 0.000139 1.64 AML other m 2021-10-27T02:44:52.84
IV.BDI.HHE. ML:1.4 8.73E-5 0.98 AML other m 2021-10-27T02:44:53.91
GU.POPM.HHN. ML:1.2 6.605E-5 0.52 AML other m 2021-10-27T02:44:53.96
GU.CARD.HHN. ML:1.3 5.855E-5 0.62 AML other m 2021-10-27T02:44:54.89
GU.CARD.HHE. ML:1.5 9.4E-5 0.56 AML other m 2021-10-27T02:44:54.95
IV.MSSA.HHE. ML:2.1 0.0001423 0.98 AML other m 2021-10-27T02:44:56.61
IV.MSSA.HHN. ML:2.4 0.0002475 0.92 AML other m 2021-10-27T02:45:08.89
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