Earthquake with magnitude of ML 1.0 on date 21-07-2020 and time 06:14:45 (Italy) in region 8 km S Casola Valsenio (RA)

A magnitude ML 1.0 earthquake occured in region: 8 km S Casola Valsenio (RA), on

  • 21-07-2020 04:14:45 (UTC)
  • 21-07-2020 06:14:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.16, 11.63 at 11 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 8 2617 2617
Palazzuolo sul Senio FI 8 1154 3771
Marradi FI 9 3139 6910
Castel del Rio BO 12 1246 8156
Fontanelice BO 13 1943 10099
Tredozio FC 13 1212 11311
Modigliana FC 13 4560 15871
Brisighella RA 14 7639 23510
Borgo Tossignano BO 14 3288 26798
Riolo Terme RA 16 5720 32518
Casalfiumanese BO 16 3438 35956
Portico e San Benedetto FC 19 756 36712

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Imola (69797 inhabitants)
25 Km SW of Faenza (58541 inhabitants)
34 Km W of Forlì (117913 inhabitants)
44 Km SE of Bologna (386663 inhabitants)
49 Km W of Cesena (96758 inhabitants)
52 Km NE of Prato (191150 inhabitants)
52 Km NE of Firenze (382808 inhabitants)
54 Km SW of Ravenna (159116 inhabitants)
57 Km NE of Scandicci (50609 inhabitants)
62 Km E of Pistoia (90315 inhabitants)
76 Km S of Ferrara (133155 inhabitants)
76 Km W of Rimini (147750 inhabitants)
78 Km SE of Modena (184973 inhabitants)
79 Km N of Arezzo (99543 inhabitants)
91 Km SE of Carpi (70699 inhabitants)
96 Km N of Siena (53903 inhabitants)
96 Km E of Lucca (89046 inhabitants)
99 Km SE of Reggio nell'Emilia (171345 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 1.0 2020-07-21
04:14:45
44.16 11.63 11 2020-07-21
04:22:30
Sala Sismica INGV-Roma 81207141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-21 04:14:45 ± 0.14
Latitude 44.16 ± 0.01
Longitude 11.63 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 81207141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 767
Semi-minor axis of confidence ellipse (meter) 459
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 349
Circular confidence region, given by single value of horizontal uncertainty (meter) 770
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 12
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
Epicentral distance of station farthest from the epicenter (degree) 0.37772
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 81207141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-21 04:22:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FERC.HNZ. 2020-07-21T04:16:32.09 3.0 undecidable manual Pg 24.02 0
IV.CAGR.HHZ. 2020-07-21T04:16:14.95 3.0 undecidable manual Pn 1.85 0
IV.QLNO.HHZ. 2020-07-21T04:16:14.35 3.0 undecidable manual Sg 17.440001 0
XK.GIZZ.HHZ. 2020-07-21T04:16:09.66 3.0 positive manual Pn 7.69 0
IV.PTRJ.HNZ. 2020-07-21T04:15:58.12 3.0 undecidable manual Sn -4.52 0
OX.DRE.HHZ. 2020-07-21T04:15:53.50 3.0 undecidable manual Sg 14.17 0
OT.OT13.EHZ. 2020-07-21T04:15:29.41 3.0 positive manual Pn -0.69 0
IV.MILN.HNZ. 2020-07-21T04:15:27.58 3.0 undecidable manual Pg 10.08 0
IV.SGTA.HHZ. 2020-07-21T04:15:27.62 3.0 undecidable manual Pn -4.42 0
IV.CSNT.HHZ. 2020-07-21T04:15:11.75 3.0 undecidable manual Sg 0.9 0
IV.MURB.HHZ. 2020-07-21T04:15:07.65 3.0 undecidable manual Sg 1.18 0
IV.RONT.HHZ. 2020-07-21T04:14:55.37 0.6 undecidable manual S 221 0.214 50 0.93 39
IV.SEI.HHZ. 2020-07-21T04:14:54.83 0.6 undecidable manual S 242 0.2176 50 0.28 48
IV.ASQU.HHZ. 2020-07-21T04:14:53.64 0.1 undecidable manual P 162 0.3777 50 0.13 97
IV.BRIS.HHZ. 2020-07-21T04:14:52.03 0.6 undecidable manual S 56 0.1214 129 0.4 47
IV.SFI.EHZ. 2020-07-21T04:14:52.04 0.1 undecidable manual P 148 0.2968 50 -0.09 94
IV.VISG.HHZ. 2020-07-21T04:14:52.17 0.6 undecidable manual S 284 0.1421 125 -0.08 51
IV.SEI.HHZ. 2020-07-21T04:14:50.60 1.0 undecidable manual P 242 0.2176 50 -0.17 24
IV.LMD.HHZ. 2020-07-21T04:14:50.78 0.3 undecidable manual S 144 0.0971 135 -0.16 76
IV.RONT.HHZ. 2020-07-21T04:14:50.77 0.1 positive manual P 221 0.214 50 0.06 100
IV.VISG.HHZ. 2020-07-21T04:14:49.29 0.3 positive manual P 284 0.1421 125 -0.15 74
IV.APEC.HHZ. 2020-07-21T04:14:49.70 3.0 positive manual P 1.57 0
IV.BRIS.HHZ. 2020-07-21T04:14:49.07 0.6 positive manual P 56 0.1214 129 -0.01 50
IV.LMD.HHZ. 2020-07-21T04:14:48.46 0.6 positive manual P 144 0.0971 135 -0.23 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1 8.165E-5 0.1 AML other m 2020-07-21T04:14:52.46
IV.BRIS.HHN. ML:1.2 0.000173 0.4 AML other m 2020-07-21T04:14:52.86
IV.VISG.HHN. ML:1.1 0.0001055 0.38 AML other m 2020-07-21T04:14:52.51
IV.LMD.HHE. ML:0.8 6.605E-5 0.74 AML other m 2020-07-21T04:14:53.62
IV.LMD.HHN. ML:0.8 7.37E-5 0.34 AML other m 2020-07-21T04:14:53.28
IV.SEI.HHE. ML:1 6.215E-5 1.72 AML other m 2020-07-21T04:14:54.88
IV.BRIS.HHE. ML:1.2 0.000161 1.28 AML other m 2020-07-21T04:14:55.01
IV.SEI.HHN. ML:1.3 0.0001295 0.56 AML other m 2020-07-21T04:14:56.14
IV.RONT.HHN. ML:1 6.64E-5 1.26 AML other m 2020-07-21T04:14:57.97
IV.RONT.HHE. ML:1.1 8.11E-5 0.36 AML other m 2020-07-21T04:14:59.63
IV.ASQU.HHN. ML:0.5 1.1745E-5 0.36 AML other m 2020-07-21T04:15:03.66
IV.ASQU.HHE. ML:0.5 1.053E-5 0.98 AML other m 2020-07-21T04:15:04.77
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download