Earthquake with magnitude of ML 1.3 on date 23-07-2020 and time 22:38:28 (Italy) in region 4 km S Faenza (RA)

A magnitude ML 1.3 earthquake occured in region: 4 km S Faenza (RA), on

  • 23-07-2020 20:38:28 (UTC)
  • 23-07-2020 22:38:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.25, 11.88 at 20 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
Faenza RA 4 58541 58541
Brisighella RA 9 7639 66180
Castel Bolognese RA 10 9554 75734
Castrocaro Terme e Terra del Sole FC 10 6426 82160
Modigliana FC 12 4560 86720
Riolo Terme RA 13 5720 92440
Solarolo RA 13 4488 96928
Forlì FC 13 117913 214841
Dovadola FC 14 1653 216494
Cotignola RA 16 7474 223968
Bagnara di Romagna RA 16 2429 226397
Mordano BO 17 4760 231157
Imola BO 17 69797 300954
Predappio FC 18 6346 307300
Russi RA 19 12247 319547
Lugo RA 19 32390 351937

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km S of Faenza (58541 inhabitants)
13 Km W of Forlì (117913 inhabitants)
17 Km SE of Imola (69797 inhabitants)
32 Km W of Cesena (96758 inhabitants)
32 Km SW of Ravenna (159116 inhabitants)
51 Km SE of Bologna (386663 inhabitants)
59 Km W of Rimini (147750 inhabitants)
68 Km SE of Ferrara (133155 inhabitants)
73 Km NE of Firenze (382808 inhabitants)
75 Km NE of Prato (191150 inhabitants)
78 Km NE of Scandicci (50609 inhabitants)
84 Km E of Pistoia (90315 inhabitants)
87 Km N of Arezzo (99543 inhabitants)
87 Km SE of Modena (184973 inhabitants)
91 Km W of Pesaro (94582 inhabitants)
92 Km S of Rovigo (51867 inhabitants)
98 Km SE of Carpi (70699 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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 1.3 2020-07-23
20:38:28
44.25 11.88 20 2020-07-23
20:56:13
Sala Sismica INGV-Roma 81286641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-23 20:38:28 ± 0.21
Latitude 44.25 ± 0.01
Longitude 11.88 ± 0.01
Depth (km) 20 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81286641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 939
Semi-minor axis of confidence ellipse (meter) 896
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 940
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
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) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 0.63312
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 81286641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-23 20:56:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRE.HHZ. 2020-07-23T20:38:47.04 3.0 undecidable manual S 175 0.6331 99 -3.13 0
IV.RUFI.EHZ. 2020-07-23T20:38:46.31 0.6 undecidable manual S 213 0.4901 102 0.33 47
IV.ASQU.HHZ. 2020-07-23T20:38:45.56 0.3 undecidable manual S 188 0.4578 103 0.5 67
IV.SEI.HHZ. 2020-07-23T20:38:44.53 0.3 undecidable manual S 242 0.4209 105 0.54 68
IV.RINC.HHZ. 2020-07-23T20:38:44.12 0.3 undecidable manual S 208 0.4128 105 0.36 70
IV.RONT.HHZ. 2020-07-23T20:38:43.95 1.0 undecidable manual S 231 0.4092 105 0.28 24
IV.VISG.HHZ. 2020-07-23T20:38:42.00 0.3 undecidable manual S 259 0.3238 110 0.76 63
IV.CRE.HHZ. 2020-07-23T20:38:41.47 0.3 undecidable manual P 175 0.6331 99 0.35 67
IV.SFI.EHZ. 2020-07-23T20:38:41.88 0.6 undecidable manual S 184 0.3462 109 0.01 51
IV.LMD.HHZ. 2020-07-23T20:38:38.01 0.3 undecidable manual S 215 0.2122 123 -0.26 74
IV.RUFI.EHZ. 2020-07-23T20:38:38.27 0.6 positive manual P 213 0.4901 102 -0.43 45
IV.RONT.HHZ. 2020-07-23T20:38:37.20 0.3 negative manual P 231 0.4092 105 -0.16 73
IV.SEI.HHZ. 2020-07-23T20:38:37.28 0.6 negative manual P 242 0.4209 105 -0.27 47
IV.ASQU.HHZ. 2020-07-23T20:38:37.72 1.0 undecidable manual P 188 0.4578 103 -0.45 23
IV.BRSN.EHZ. 2020-07-23T20:38:37.33 0.3 undecidable manual S 77 0.1484 134 0.52 69
IV.RINC.HHZ. 2020-07-23T20:38:37.10 0.3 positive manual P 208 0.4128 105 -0.31 71
IV.VISG.HHZ. 2020-07-23T20:38:35.57 0.3 positive manual P 259 0.3238 110 -0.39 71
IV.BRIS.HHZ. 2020-07-23T20:38:35.32 0.3 undecidable manual S 252 0.0836 151 -0.32 75
IV.SFI.EHZ. 2020-07-23T20:38:35.75 0.6 negative manual P 184 0.3462 109 -0.58 45
IV.LMD.HHZ. 2020-07-23T20:38:33.66 0.6 negative manual P 215 0.2122 123 -0.59 45
IV.BRSN.EHZ. 2020-07-23T20:38:33.30 0.3 negative manual P 77 0.1484 134 -0.1 79
IV.IMOL.EHZ. 2020-07-23T20:38:33.61 0.1 positive manual P 318 0.1457 135 0.25 100
IV.BRIS.HHZ. 2020-07-23T20:38:32.36 0.1 positive manual P 252 0.0836 151 -0.37 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:1.6 0.0002725 0.32 AML other m 2020-07-23T20:38:35.96
IV.BRIS.HHN. ML:1.7 0.000367 1.52 AML other m 2020-07-23T20:38:35.97
IV.LMD.HHN. ML:1.7 0.000271 0.28 AML other m 2020-07-23T20:38:38.32
IV.LMD.HHE. ML:1.6 0.0002175 0.14 AML other m 2020-07-23T20:38:38.33
IV.BRSN.EHE. ML:1.7 0.000333 0.88 AML other m 2020-07-23T20:38:38.46
IV.BRSN.EHN. ML:1.7 0.000291 0.18 AML other m 2020-07-23T20:38:38.72
IV.SFI.EHE. ML:1.4 7.385E-5 0.46 AML other m 2020-07-23T20:38:42.14
IV.SFI.EHN. ML:1.2 5.205E-5 0.62 AML other m 2020-07-23T20:38:42.20
IV.VISG.HHE. ML:1.1 4.7E-5 0.42 AML other m 2020-07-23T20:38:42.59
IV.VISG.HHN. ML:1.5 0.0001057 0.24 AML other m 2020-07-23T20:38:43.24
IV.RINC.HHE. ML:1.3 5.335E-5 0.84 AML other m 2020-07-23T20:38:44.79
IV.SEI.HHE. ML:1.3 5.165E-5 0.6 AML other m 2020-07-23T20:38:44.63
IV.RINC.HHN. ML:1 2.395E-5 1.2 AML other m 2020-07-23T20:38:45.30
IV.ASQU.HHE. ML:1.2 3.825E-5 0.8 AML other m 2020-07-23T20:38:45.49
IV.SEI.HHN. ML:1.6 0.0001002 0.54 AML other m 2020-07-23T20:38:46.33
IV.ASQU.HHN. ML:1 2.7E-5 0.88 AML other m 2020-07-23T20:38:47.72
IV.CRE.HHN. ML:1.4 3.765E-5 0.34 AML other m 2020-07-23T20:38:51.74
IV.CRE.HHE. ML:1 1.745E-5 1.28 AML other m 2020-07-23T20:38:52.87
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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