Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 04-04-2022 and time 17:31:28 (UTC) in region 3 km NW Riolunato (MO)

A magnitude ML 1.6 earthquake occured in region: 3 km NW Riolunato (MO), on

  • 04-04-2022 17:31:28 (UTC)
  • 04-04-2022 19:31:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2490, 10.6180 at 17 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
Riolunato MO 4 712 712
Pievepelago MO 5 2222 2934
Frassinoro MO 6 1926 4860
Fiumalbo MO 8 1280 6140
Montecreto MO 8 940 7080
Palagano MO 8 2194 9274
Lama Mocogno MO 11 2734 12008
Abetone PT 12 621 12629
Sestola MO 12 2508 15137
Montefiorino MO 12 2203 17340
Polinago MO 14 1672 19012
Fanano MO 15 2989 22001
Toano RE 15 4463 26464
Villa Minozzo RE 18 3750 30214
Fosciandora LU 20 602 30816
Cutigliano PT 20 1488 32304
Castiglione di Garfagnana LU 20 1818 34122

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km NW of Pistoia (90315 inhabitants)
45 Km NE of Massa (69479 inhabitants)
46 Km E of Carrara (63133 inhabitants)
46 Km N of Lucca (89046 inhabitants)
50 Km S of Reggio nell'Emilia (171345 inhabitants)
51 Km SW of Modena (184973 inhabitants)
52 Km NE of Viareggio (62467 inhabitants)
56 Km NW of Prato (191150 inhabitants)
62 Km N of Pisa (89158 inhabitants)
63 Km SW of Carpi (70699 inhabitants)
64 Km W of Bologna (386663 inhabitants)
65 Km E of La Spezia (93959 inhabitants)
66 Km SE of Parma (192836 inhabitants)
71 Km NW of Scandicci (50609 inhabitants)
74 Km NW of Firenze (382808 inhabitants)
81 Km NE of Livorno (159219 inhabitants)
88 Km W of Imola (69797 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 1.6 2022-04-04
17:31:28		 44.2493 10.6183 17 2022-07-08
12:33:42		 Bollettino Sismico Italiano INGV 102877691
Reviewed
Rev100 		ML 1.5 2022-04-04
17:31:28		 44.2252 10.6203 11 2022-04-04
17:38:45		 Sala Sismica INGV-Roma 102781201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-04-04 17:31:28 ± 0.11
Latitude 44.2493 ± 0.0045
Longitude 10.6183 ± 0.0050
Depth (km) 17 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102877691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 506
Semi-minor axis of confidence ellipse (meter) 207
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 212
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 80
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.79050
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 102781201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-04-04 17:38:45

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 102877691
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-04-07 14:13:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GRAM.HHZ. 2022-04-04T17:31:44.48 0.3 undecidable manual S 302 51.4152 99 -0.17 69
IV.MSSA.HHZ. 2022-04-04T17:31:44.01 0.3 undecidable manual P 275 87.7455 95 0.68 56
IV.MOCL.EHZ. 2022-04-04T17:31:44.86 0.3 undecidable manual S 121 52.3032 99 -0.05 70
IV.MPPT.EHZ. 2022-04-04T17:31:44.07 0.3 undecidable manual S 131 49.617 99 -0.11 70
IV.FNVD.HHZ. 2022-04-04T17:31:41.84 0.3 undecidable manual S 103 41.1255 102 -0.12 71
GU.MAIM.HHZ. 2022-04-04T17:31:41.00 0.3 undecidable manual S 195 38.628 103 -0.31 68
IV.ZCCA.HHZ. 2022-04-04T17:31:39.64 0.3 undecidable manual S 68 30.5472 108 0.41 68
GU.CARD.HHZ. 2022-04-04T17:31:38.40 0.3 undecidable manual S 204 27.0507 111 0.06 73
IV.CRMI.HHZ. 2022-04-04T17:31:38.88 0.3 undecidable manual P 150 57.9975 98 0.11 69
IV.PII.HHZ. 2022-04-04T17:31:38.75 0.3 undecidable manual P 187 58.9965 97 -0.17 68
IV.MPPT.EHZ. 2022-04-04T17:31:37.33 0.3 undecidable manual P 131 49.617 99 -0.17 69
GU.GRAM.HHZ. 2022-04-04T17:31:37.86 0.3 undecidable manual P 302 51.4152 99 0.1 70
IV.MOCL.EHZ. 2022-04-04T17:31:37.72 0.1 undecidable manual P 121 52.3032 99 -0.19 91
IV.ERBM.EHE. 2022-04-04T17:31:37.33 0.3 undecidable manual S 319 24.9528 113 -0.49 68
GU.POPM.HHZ. 2022-04-04T17:31:37.87 0.3 undecidable manual S 154 25.1526 113 -0.01 74
GU.EQUI.HHZ. 2022-04-04T17:31:36.24 0.3 undecidable manual P 256 38.1285 103 0.48 66
GU.SARM.EHN. 2022-04-04T17:31:36.53 0.3 undecidable manual S 247 18.7701 122 0.18 73
IV.FNVD.HHZ. 2022-04-04T17:31:36.02 0.3 undecidable manual P 103 41.1255 102 -0.19 70
GU.MAIM.HHZ. 2022-04-04T17:31:35.83 0.3 undecidable manual P 195 38.628 103 0 73
IV.ZCCA.HHZ. 2022-04-04T17:31:35.27 0.3 undecidable manual P 68 30.5472 108 0.63 63
GU.CARD.HHZ. 2022-04-04T17:31:34.08 0.1 undecidable manual P 204 27.0507 111 -0.04 99
GU.GSCL.HHZ. 2022-04-04T17:31:34.93 0.6 undecidable manual S 348 11.4774 139 0.05 50
IV.ERBM.EHE. 2022-04-04T17:31:33.18 0.1 undecidable manual P 319 24.9528 113 -0.64 85
GU.POPM.HHZ. 2022-04-04T17:31:33.87 0.1 positive manual P 154 25.1526 113 0.02 99
GU.SARM.EHN. 2022-04-04T17:31:33.13 0.1 undecidable manual P 247 18.7701 122 0.16 97
GU.GSCL.HHZ. 2022-04-04T17:31:32.21 0.1 positive manual P 348 11.4774 139 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.GSCL.HHE. ML:1.6 0.0003005 0.22 AML other m 2022-04-04T17:31:35.12
GU.GSCL.HHN. ML:1.8 0.00047750000000000006 0.34 AML other m 2022-04-04T17:31:35.15
IV.FNVD.HHN. ML:1.2 0.00005535 1.06 AML other m 2022-04-04T17:31:36.75
GU.CARD.HHE. ML:1.7 0.0002505 1.3 AML other m 2022-04-04T17:31:38.72
GU.POPM.HHN. ML:1.8 0.00029800000000000003 0.72 AML other m 2022-04-04T17:31:38.80
GU.POPM.HHE. ML:1.7 0.000246 0.5 AML other m 2022-04-04T17:31:39.31
GU.CARD.HHN. ML:1.6 0.000178 0.36 AML other m 2022-04-04T17:31:39.02
GU.MAIM.HHE. ML:1.0 0.000036750000000000006 0.64 AML other m 2022-04-04T17:31:41.49
GU.MAIM.HHN. ML:1.2 0.00004875 1.22 AML other m 2022-04-04T17:31:41.36
IV.FNVD.HHE. ML:1.2 0.00005599999999999999 0.28 AML other m 2022-04-04T17:31:43.45
IV.PII.HHE. ML:1.8 0.00014549999999999999 0.28 AML other m 2022-04-04T17:31:46.32
IV.PII.HHN. ML:1.8 0.000132 0.16 AML other m 2022-04-04T17:31:47.23
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