Earthquake with magnitude of ML 1.2 on date 04-07-2020 and time 06:11:25 (Italy) in region 4 km E Casola Valsenio (RA)

A magnitude ML 1.2 earthquake occured in region: 4 km E Casola Valsenio (RA), on

  • 04-07-2020 04:11:25 (UTC)
  • 04-07-2020 06:11:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.23, 11.68 at 24 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
Riolo Terme RA 6 5720 8337
Brisighella RA 8 7639 15976
Borgo Tossignano BO 9 3288 19264
Casalfiumanese BO 9 3438 22702
Fontanelice BO 10 1943 24645
Modigliana FC 13 4560 29205
Imola BO 14 69797 99002
Castel Bolognese RA 14 9554 108556
Castel del Rio BO 14 1246 109802
Dozza BO 15 6652 116454
Palazzuolo sul Senio FI 17 1154 117608
Faenza RA 17 58541 176149
Tredozio FC 18 1212 177361
Marradi FI 18 3139 180500
Solarolo RA 19 4488 184988
Castel San Pietro Terme BO 20 20811 205799

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km S of Imola (69797 inhabitants)
17 Km W of Faenza (58541 inhabitants)
29 Km W of Forlì (117913 inhabitants)
39 Km SE of Bologna (386663 inhabitants)
46 Km W of Ravenna (159116 inhabitants)
46 Km W of Cesena (96758 inhabitants)
61 Km NE of Prato (191150 inhabitants)
62 Km NE of Firenze (382808 inhabitants)
66 Km NE of Scandicci (50609 inhabitants)
67 Km S of Ferrara (133155 inhabitants)
69 Km E of Pistoia (90315 inhabitants)
74 Km W of Rimini (147750 inhabitants)
75 Km SE of Modena (184973 inhabitants)
87 Km N of Arezzo (99543 inhabitants)
88 Km SE of Carpi (70699 inhabitants)
94 Km S of Rovigo (51867 inhabitants)
98 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 1.2 2020-07-04
04:11:25
44.23 11.68 24 2020-07-04
04:26:09
Sala Sismica INGV-Roma 80758401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-04 04:11:25 ± 0.4
Latitude 44.23 ± 0.02
Longitude 11.68 ± 0.01
Depth (km) 24 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 80758401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1640
Semi-minor axis of confidence ellipse (meter) 649
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 191
Circular confidence region, given by single value of horizontal uncertainty (meter) 1640
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.19695
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 80758401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-04 04:26:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GATE.HHZ. 2020-07-04T04:13:20.16 3.0 undecidable manual Sg 15.47 0
GU.BLANC.HHZ. 2020-07-04T04:12:34.42 3.0 undecidable manual Pg 13.09 0
IV.ROSPO.HHZ. 2020-07-04T04:12:22.76 3.0 undecidable manual Pg 8.54 0
IV.RIBO.EHZ.01 2020-07-04T04:11:50.29 3.0 negative manual P -0.04 0
IT.FIE.HGZ. 2020-07-04T04:11:46.90 3.0 undecidable manual S 0.85 0
IV.APEC.HHZ. 2020-07-04T04:11:43.59 3.0 negative manual P 0.05 0
IV.MTRZ.HNZ. 2020-07-04T04:11:35.46 0.3 undecidable manual S 294 0.197 132 0.41 69
IV.VISG.HHZ. 2020-07-04T04:11:34.41 0.3 undecidable manual S 256 0.1799 135 -0.26 73
IV.LMD.HHZ. 2020-07-04T04:11:34.28 0.6 undecidable manual S 172 0.1583 139 0.05 50
IV.BRIS.HHZ. 2020-07-04T04:11:32.82 0.3 undecidable manual S 98 0.0648 161 -0.02 77
IV.LMD.HHZ. 2020-07-04T04:11:30.78 0.6 negative manual P 172 0.1583 139 0.34 48
IV.MTRZ.HNZ. 2020-07-04T04:11:30.89 0.3 undecidable manual P 294 0.197 132 -0.02 75
IV.VISG.HHZ. 2020-07-04T04:11:30.56 0.3 undecidable manual P 256 0.1799 135 -0.14 74
IV.BRIS.HHZ. 2020-07-04T04:11:29.50 0.1 positive manual P 98 0.0648 161 -0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:1.4 0.000173201 0.3424 AML other m 2020-07-04T04:11:33.08
IV.BRIS.HHN. ML:1.2 8.7947235E-5 0.24 AML other m 2020-07-04T04:11:34.14
IV.BRIS.HNE. ML:1.3 0.0001271781 0.5792 AML other m 2020-07-04T04:11:32.06
IV.BRIS.HNN. ML:1.4 0.00015876945 0.8096 AML other m 2020-07-04T04:11:36.14
IV.VISG.HHE. ML:1.3 8.8973295E-5 0.1216 AML other m 2020-07-04T04:11:35.70
IV.VISG.HHN. ML:1.3 9.7103235E-5 0.2176 AML other m 2020-07-04T04:11:35.78
IV.LMD.HHE. ML:0.8 2.963248E-5 0.2016 AML other m 2020-07-04T04:11:37.21
IV.LMD.HHN. ML:0.7 2.281146E-5 0.2208 AML other m 2020-07-04T04:11:36.08
IV.APEC.HHE. ML:1.9 7.556066E-5 0.0576 AML other m 2020-07-04T04:11:44.04
IV.APEC.HHN. ML:1.6 4.699407E-5 0.0608 AML other m 2020-07-04T04:11:44.14
IV.APEC.HNE. ML:3 0.00117081805 1.2384 AML other m 2020-07-04T04:12:17.60
IV.APEC.HNN. ML:2.9 0.00081324835 0.9792 AML other m 2020-07-04T04:12:16.36
IV.RIBO.EHE.01 ML:2.1 6.317966E-5 0.0992 AML other m 2020-07-04T04:11:54.47
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