Earthquake with magnitude of ML 1.1 on date 21-07-2020 and time 05:22:12 (Italy) in region 3 km S Casola Valsenio (RA)

A magnitude ML 1.1 earthquake occured in region: 3 km S Casola Valsenio (RA), on

  • 21-07-2020 03:22:12 (UTC)
  • 21-07-2020 05:22:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.19, 11.62 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
Casola Valsenio RA 4 2617 2617
Fontanelice BO 9 1943 4560
Castel del Rio BO 9 1246 5806
Borgo Tossignano BO 10 3288 9094
Palazzuolo sul Senio FI 10 1154 10248
Casalfiumanese BO 12 3438 13686
Brisighella RA 13 7639 21325
Riolo Terme RA 13 5720 27045
Marradi FI 13 3139 30184
Modigliana FC 15 4560 34744
Tredozio FC 16 1212 35956
Dozza BO 19 6652 42608
Imola BO 20 69797 112405

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SW of Imola (69797 inhabitants)
24 Km W of Faenza (58541 inhabitants)
34 Km W of Forlì (117913 inhabitants)
40 Km SE of Bologna (386663 inhabitants)
51 Km W of Cesena (96758 inhabitants)
53 Km W of Ravenna (159116 inhabitants)
54 Km NE of Prato (191150 inhabitants)
55 Km NE of Firenze (382808 inhabitants)
59 Km NE of Scandicci (50609 inhabitants)
63 Km E of Pistoia (90315 inhabitants)
72 Km S of Ferrara (133155 inhabitants)
74 Km SE of Modena (184973 inhabitants)
77 Km W of Rimini (147750 inhabitants)
84 Km N of Arezzo (99543 inhabitants)
87 Km SE of Carpi (70699 inhabitants)
96 Km SE of Reggio nell'Emilia (171345 inhabitants)
97 Km E of Lucca (89046 inhabitants)
99 Km S of Rovigo (51867 inhabitants)
100 Km N of Siena (53903 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 1.1 2020-07-21
03:22:12
44.19 11.62 19 2020-07-21
03:50:38
Sala Sismica INGV-Roma 81206811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-21 03:22:12 ± 0.27
Latitude 44.19 ± 0.01
Longitude 11.62 ± 0.01
Depth (km) 19 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81206811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 789
Semi-minor axis of confidence ellipse (meter) 455
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 165
Circular confidence region, given by single value of horizontal uncertainty (meter) 790
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 166
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33365
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 81206811
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-21 03:50:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.EUCT.HNZ. 2020-07-21T03:23:23.08 3.0 undecidable manual Sg 2.04 0
IV.LAV9.HHZ. 2020-07-21T03:22:58.13 3.0 positive manual Pn 1.64 0
IV.MURB.HHZ. 2020-07-21T03:22:51.93 3.0 undecidable manual S 0.57 0
IV.MURB.HHZ. 2020-07-21T03:22:34.91 3.0 negative manual P -0.3 0
IV.SFI.EHZ. 2020-07-21T03:22:25.14 0.6 undecidable manual S 150 0.3336 108 -0.12 47
IV.SEI.HHZ. 2020-07-21T03:22:22.75 0.6 undecidable manual S 233 0.2311 118 0.29 47
IV.RONT.HHZ. 2020-07-21T03:22:22.87 0.6 undecidable manual S 213 0.2392 117 0.2 48
IV.BRIS.HHZ. 2020-07-21T03:22:19.76 0.6 undecidable manual S 74 0.1124 142 0.02 51
IV.SFI.EHZ. 2020-07-21T03:22:19.93 1.0 positive manual P 150 0.3336 108 0.03 24
IV.VISG.HHE. 2020-07-21T03:22:19.86 0.1 undecidable manual S 268 0.1295 137 -0.2 97
IV.SEI.HHZ. 2020-07-21T03:22:18.21 1.0 positive manual P 233 0.2311 118 -0.08 25
IV.RONT.HHZ. 2020-07-21T03:22:18.44 0.3 positive manual P 213 0.2392 117 0.03 74
IV.BRIS.HHZ. 2020-07-21T03:22:16.82 0.1 positive manual P 74 0.1124 142 0.1 99
IV.LMD.HHZ. 2020-07-21T03:22:16.13 1.0 positive manual P 150 0.1331 136 -0.82 20
IV.VISG.HHE. 2020-07-21T03:22:16.96 0.1 undecidable manual P 268 0.1295 137 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:1 7.105E-5 0.1 AML other m 2020-07-21T03:22:19.98
IV.BRIS.HHN. ML:1.1 8.795E-5 0.34 AML other m 2020-07-21T03:22:20.49
IV.RONT.HHE. ML:1 4.66E-5 0.78 AML other m 2020-07-21T03:22:24.69
IV.RONT.HHN. ML:1 4.625E-5 1.2 AML other m 2020-07-21T03:22:24.69
IV.FIR.HHN. ML:1.7 0.000112 0.06 AML other m 2020-07-21T03:22:33.70
IV.FIR.HHE. ML:0 0.000156 0.3 AML other m 2020-07-21T03:22:36.41
IV.LAV9.HNE. ML:0 0.0007435 0.42 AML other m 2020-07-21T03:22:58.62
IV.LAV9.HHE. ML:0 0.0003575 0.24 AML other m 2020-07-21T03:23:33.59
IV.LAV9.HHN. ML:0 0.000436 0.22 AML other m 2020-07-21T03:23:39.14
IV.LAV9.HNN. ML:0 0.0004155 0.24 AML other m 2020-07-21T03:23:39.15
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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