Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 21-01-2020 and time 04:04:27 (Italy) in region 2 km SE Castiglione dei Pepoli (BO)

A magnitude ML 1.8 earthquake occured in region: 2 km SE Castiglione dei Pepoli (BO), on

  • 21-01-2020 03:04:27 (UTC)
  • 21-01-2020 04:04:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1280, 11.1610 at 8 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
Castiglione dei Pepoli BO 2 5648 5648
Camugnano BO 7 1885 7533
Vernio PO 8 6060 13593
Castel di Casio BO 11 3448 17041
San Benedetto Val di Sambro BO 11 4315 21356
Cantagallo PO 12 3105 24461
Sambuca Pistoiese PT 13 1626 26087
Grizzana Morandi BO 14 3916 30003
Alto Reno Terme BO 15 6960 36963
Barberino di Mugello FI 15 10836 47799
Monghidoro BO 16 3749 51548
Firenzuola FI 18 4726 56274
Vergato BO 18 7639 63913
Vaiano PO 18 9895 73808
Monzuno BO 19 6328 80136
Gaggio Montano BO 20 4878 85014

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km N of Prato (191150 inhabitants)
29 Km NE of Pistoia (90315 inhabitants)
41 Km N of Firenze (382808 inhabitants)
41 Km N of Scandicci (50609 inhabitants)
43 Km SW of Bologna (386663 inhabitants)
51 Km W of Imola (69797 inhabitants)
60 Km W of Faenza (58541 inhabitants)
61 Km SE of Modena (184973 inhabitants)
61 Km NE of Lucca (89046 inhabitants)
71 Km W of Forlì (117913 inhabitants)
76 Km NE of Pisa (89158 inhabitants)
76 Km SE of Carpi (70699 inhabitants)
76 Km SE of Reggio nell'Emilia (171345 inhabitants)
78 Km E of Viareggio (62467 inhabitants)
82 Km E of Massa (69479 inhabitants)
85 Km E of Carrara (63133 inhabitants)
86 Km W of Cesena (96758 inhabitants)
87 Km SW of Ferrara (133155 inhabitants)
89 Km W of Ravenna (159116 inhabitants)
91 Km N of Siena (53903 inhabitants)
94 Km NE of Livorno (159219 inhabitants)
94 Km NW of Arezzo (99543 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 2020-01-21
03:04:27		 44.1282 11.1612 8 2020-07-18
21:08:19		 Bollettino Sismico Italiano INGV 75798121
Reviewed
Rev100 		ML 1.8 2020-01-21
03:04:27		 44.126 11.1843 10 2020-01-21
03:12:36		 Sala Sismica INGV-Roma 75691601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-21 03:04:27 ± 0.09
Latitude 44.1282 ± 0.0054
Longitude 11.1612 ± 0.0063
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75798121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 610
Semi-minor axis of confidence ellipse (meter) 162
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 358
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 22
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.46675
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 75691601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-21 03:12:36

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 75798121
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-01-24 16:57:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRIS.HHZ. 2020-01-21T03:04:44.58 0.6 undecidable manual S 77 49.3173 50 0.71 40
IV.BDI.HHZ. 2020-01-21T03:04:42.92 0.3 undecidable manual S 261 45.621 50 0.05 72
GU.POPM.HHZ. 2020-01-21T03:04:39.31 0.3 undecidable manual S 254 33.4443 103 -0.12 73
IV.PII.HHZ. 2020-01-21T03:04:39.44 3.0 undecidable manual P -0.23 0
IV.MTRZ.HNN. 2020-01-21T03:04:38.86 0.3 undecidable manual S 46 29.3484 105 0.84 59
GU.GSCL.HHN. 2020-01-21T03:04:37.33 0.3 undecidable manual P 299 51.8037 50 0.01 72
IV.RONT.HHZ. 2020-01-21T03:04:37.11 0.3 undecidable manual S 124 26.3514 106 0.09 74
IV.ZCCA.HNZ. 2020-01-21T03:04:37.36 0.3 undecidable manual S 329 28.749 105 -0.46 68
IV.BDI.HHZ. 2020-01-21T03:04:36.19 0.1 undecidable manual P 261 45.621 50 -0.18 94
IV.RINC.HHN. 2020-01-21T03:04:36.48 0.3 undecidable manual P 127 44.5221 50 0.27 69
IV.BRIS.HHZ. 2020-01-21T03:04:36.92 0.1 undecidable manual P 77 49.3173 50 -0.03 96
IV.VISG.HHZ. 2020-01-21T03:04:35.18 0.3 undecidable manual S 73 22.755 109 -0.66 64
IV.MPPT.EHZ. 2020-01-21T03:04:35.44 0.3 undecidable manual S 197 19.7691 111 0.58 67
IV.RUFI.EHZ. 2020-01-21T03:04:35.70 0.1 undecidable manual P 139 42.5241 50 -0.2 94
IV.CRMI.HNN. 2020-01-21T03:04:35.15 0.1 undecidable manual P 202 39.627 50 -0.3 93
IV.ZCCA.HNZ. 2020-01-21T03:04:34.07 0.1 undecidable manual P 329 28.749 105 0.61 87
GU.POPM.HHZ. 2020-01-21T03:04:34.20 0.1 undecidable manual P 254 33.4443 103 -0.18 96
IV.SEI.HHZ. 2020-01-21T03:04:34.13 0.3 undecidable manual S 117 17.7711 114 -0.09 75
IV.MTRZ.HNN. 2020-01-21T03:04:33.73 0.1 undecidable manual P 46 29.3484 105 0.16 97
IV.RONT.HHZ. 2020-01-21T03:04:32.80 0.1 undecidable manual P 124 26.3514 106 -0.19 97
IV.MPPT.EHZ. 2020-01-21T03:04:32.07 0.1 undecidable manual P 197 19.7691 111 0.32 95
IV.SEI.HHZ. 2020-01-21T03:04:31.26 0.1 undecidable manual P 117 17.7711 114 -0.12 100
IV.VISG.HHZ. 2020-01-21T03:04:31.86 0.1 undecidable manual P 73 22.755 109 -0.46 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHN. ML:2.2 0.00127 0.32 AML other m 2020-01-21T03:04:34.47
IV.SEI.HHE. ML:2.1 0.001125 0.34 AML other m 2020-01-21T03:04:35.60
IV.VISG.HHN. ML:1.6 0.000299 0.38 AML other m 2020-01-21T03:04:35.49
IV.VISG.HHE. ML:1.5 0.00021050000000000002 1.28 AML other m 2020-01-21T03:04:35.72
IV.MPPT.EHE. ML:1.7 0.000395 0.22 AML other m 2020-01-21T03:04:35.78
IV.MPPT.EHN. ML:1.9 0.0006134999999999999 1.5 AML other m 2020-01-21T03:04:36.90
IV.RONT.HHN. ML:1.9 0.0005085 0.14 AML other m 2020-01-21T03:04:38.49
IV.RONT.HHE. ML:1.9 0.00043300000000000006 1.04 AML other m 2020-01-21T03:04:38.87
GU.POPM.HHE. ML:1.5 0.000136 1.14 AML other m 2020-01-21T03:04:39.42
GU.POPM.HHN. ML:1.7 0.000203 1.4 AML other m 2020-01-21T03:04:40.92
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