Istituto Nazionale di Geofisica e Vulcanologia

Earthquake (quarry blast) with magnitude of ML 1.0 on date 07-02-2020 and time 12:04:03 (Italy) in region 5 km E Casola Valsenio (RA)

A magnitude ML 1.0 (quarry blast) earthquake occured in region: 5 km E Casola Valsenio (RA), on

  • 07-02-2020 11:04:03 (UTC)
  • 07-02-2020 12:04:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2210, 11.6860 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Casola Valsenio RA 5 2617 2617
Brisighella RA 7 7639 10256
Riolo Terme RA 7 5720 15976
Borgo Tossignano BO 10 3288 19264
Casalfiumanese BO 10 3438 22702
Fontanelice BO 11 1943 24645
Modigliana FC 11 4560 29205
Castel Bolognese RA 14 9554 38759
Castel del Rio BO 14 1246 40005
Imola BO 15 69797 109802
Dozza BO 16 6652 116454
Palazzuolo sul Senio FI 16 1154 117608
Tredozio FC 16 1212 118820
Marradi FI 17 3139 121959
Faenza RA 17 58541 180500
Dovadola FC 20 1653 182153

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km S of Imola (69797 inhabitants)
17 Km W of Faenza (58541 inhabitants)
28 Km W of Forlì (117913 inhabitants)
41 Km SE of Bologna (386663 inhabitants)
45 Km W of Cesena (96758 inhabitants)
46 Km W of Ravenna (159116 inhabitants)
60 Km NE of Prato (191150 inhabitants)
61 Km NE of Firenze (382808 inhabitants)
65 Km NE of Scandicci (50609 inhabitants)
69 Km S of Ferrara (133155 inhabitants)
69 Km E of Pistoia (90315 inhabitants)
73 Km W of Rimini (147750 inhabitants)
77 Km SE of Modena (184973 inhabitants)
85 Km N of Arezzo (99543 inhabitants)
89 Km SE of Carpi (70699 inhabitants)
95 Km S of Rovigo (51867 inhabitants)
99 Km SE of Reggio nell'Emilia (171345 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 1.0 2020-02-07
11:04:03		 44.2213 11.6862 1 2020-07-18
21:08:25		 Bollettino Sismico Italiano INGV 77189681
Reviewed
Rev100 		ML 1.8 2020-02-07
11:04:01		 44.3422 11.7377 14 2020-03-11
11:27:51		 Sala Sismica INGV-Roma 76316451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-07 11:04:03 ± 0.19
Latitude 44.2213 ± 0.0126
Longitude 11.6862 ± 0.0125
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 77189681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1380
Semi-minor axis of confidence ellipse (meter) 1010
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 17
Circular confidence region, given by single value of horizontal uncertainty (meter) 1380.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.33904
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.0
Num. used stations 4
Type of magnitude ML
Reference to an origin 77189681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-11 11:27:01

ML:1.8

Field Value
Value 1.8
Uncertainty 0.7
Num. used stations 12
Type of magnitude ML
Reference to an origin 76316451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-07 11:26:34
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAPR.HNZ. 2020-02-07T11:05:16.21 3.0 undecidable manual Sn 4.04 0
AC.VLO.HHZ. 2020-02-07T11:05:10.23 3.0 undecidable manual Pg 9.27 0
IV.VOBA.HNZ. 2020-02-07T11:05:08.73 3.0 undecidable manual Sg 4.47 0
IV.IFIL.HHZ. 2020-02-07T11:05:00.20 3.0 undecidable manual Pn 1.53 0
IV.MCRV.HHZ. 2020-02-07T11:05:00.20 3.0 undecidable manual Sn -9.99 0
IV.RIBO.EHZ.01 2020-02-07T11:04:54.06 3.0 undecidable manual Sg 9.77 0
GU.TRAV.HHZ. 2020-02-07T11:04:52.46 3.0 undecidable manual Pn 2.96 0
IV.ILLI.HHZ. 2020-02-07T11:04:52.40 3.0 positive manual Pn -8.44 0
IV.CADC.HNZ. 2020-02-07T11:04:39.32 3.0 positive manual Pg 11 0
IV.FIAM.HHZ. 2020-02-07T11:04:36.00 3.0 undecidable manual Sg 4.81 0
IV.MCRV.HHZ. 2020-02-07T11:04:35.83 3.0 undecidable manual Pg 5.57 0
SI.KOSI.HHZ. 2020-02-07T11:04:25.88 3.0 negative manual Pn -3.6 0
IV.LAV9.HNZ. 2020-02-07T11:04:22.46 3.0 positive manual Pg 5.23 0
IV.RIBO.EHZ.01 2020-02-07T11:04:13.16 3.0 undecidable manual Pn -2.42 0
IT.GLNS.HNZ. 2020-02-07T11:04:12.39 3.0 undecidable manual Pn -2.52 0
IV.SFI.HNN. 2020-02-07T11:04:10.66 0.3 undecidable manual P 160 37.4292 91 -0.46 66
IV.SEI.HHZ. 2020-02-07T11:04:10.55 0.3 undecidable manual P 235 31.9458 91 0.51 66
IV.RONT.HHN. 2020-02-07T11:04:10.44 0.6 undecidable manual P 219 32.3454 91 0.33 46
IV.RINC.HHN. 2020-02-07T11:04:10.79 0.3 undecidable manual P 190 37.629 91 -0.39 67
IV.MTRZ.HNN. 2020-02-07T11:04:08.20 0.1 undecidable manual P 296 23.0547 91 -0.06 98
IV.VISG.HHZ. 2020-02-07T11:04:07.38 0.3 undecidable manual P 260 20.3685 91 -0.33 70
IV.LMD.HHZ. 2020-02-07T11:04:07.12 0.1 undecidable manual P 174 16.0728 92 0.27 95
IV.BRIS.HHZ. 2020-02-07T11:04:05.04 0.1 positive manual P 87 6.3936 94 0.12 100
IV.COR1.EHZ. 2020-02-07T11:04:01.77 3.0 undecidable manual S 1.28 0
IV.PE3.EHZ. 2020-02-07T11:04:00.47 3.0 undecidable manual P 2.93 0
IV.CSP1.EHZ. 2020-02-07T11:03:56.70 3.0 positive manual P 0.92 0
IV.FDMO.HHZ. 2020-02-07T11:03:56.62 3.0 positive manual P -0.83 0
IV.MMO1.EHZ. 2020-02-07T11:03:56.21 3.0 negative manual P -2.22 0
IV.MC2.EHZ. 2020-02-07T11:03:55.79 3.0 positive manual P -3.09 0
IV.EL6.EHZ. 2020-02-07T11:03:52.32 3.0 positive manual P -0.69 0
IV.AOI.HHZ. 2020-02-07T11:03:44.70 3.0 negative manual P 0.13 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHN. ML:1.7 0.0007239999999999999 0.66 AML other m 2020-02-07T11:04:09.76
IV.BRIS.HHE. ML:1.7 0.000763 0.56 AML other m 2020-02-07T11:04:10.70
IV.VISG.HHE. ML:1.0 0.00007585 0.84 AML other m 2020-02-07T11:04:12.89
IV.LMD.HHE. ML:0.9 0.00009595 0.42 AML other m 2020-02-07T11:04:16.28
IV.VISG.HHN. ML:1.0 0.0000868 1.12 AML other m 2020-02-07T11:04:16.21
IV.LMD.HHN. ML:1.0 0.00011449999999999999 1 AML other m 2020-02-07T11:04:17.90
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