Earthquake with magnitude of ML 1.4 on date 22-09-2021 and time 13:16:32 (UTC) in region 6 km S Castel del Rio (BO)

A magnitude ML 1.4 earthquake occured in region: 6 km S Castel del Rio (BO), on

  • 22-09-2021 13:16:32 (UTC)
  • 22-09-2021 15:16:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.162, 11.514 at 10 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
Castel del Rio BO 6 1246 1246
Palazzuolo sul Senio FI 6 1154 2400
Casola Valsenio RA 11 2617 5017
Fontanelice BO 11 1943 6960
Firenzuola FI 12 4726 11686
Marradi FI 12 3139 14825
Borgo Tossignano BO 14 3288 18113
Monghidoro BO 17 3749 21862
Casalfiumanese BO 17 3438 25300
Loiano BO 20 4294 29594

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Imola (69797 inhabitants)
33 Km W of Faenza (58541 inhabitants)
39 Km SE of Bologna (386663 inhabitants)
43 Km W of Forlì (117913 inhabitants)
46 Km NE of Prato (191150 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
52 Km NE of Scandicci (50609 inhabitants)
54 Km E of Pistoia (90315 inhabitants)
58 Km W of Cesena (96758 inhabitants)
62 Km W of Ravenna (159116 inhabitants)
71 Km SE of Modena (184973 inhabitants)
76 Km S of Ferrara (133155 inhabitants)
83 Km NW of Arezzo (99543 inhabitants)
85 Km W of Rimini (147750 inhabitants)
85 Km SE of Carpi (70699 inhabitants)
88 Km E of Lucca (89046 inhabitants)
92 Km SE of Reggio nell'Emilia (171345 inhabitants)
95 Km N of Siena (53903 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 1.4 2021-09-22
13:16:32
44.1625 11.5145 10 2021-09-22
13:24:30
Sala Sismica INGV-Roma 95742331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 13:16:32 ± 0.09
Latitude 44.1625 ± 0.0072
Longitude 11.5145 ± 0.0075
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95742331

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 712
Semi-minor axis of confidence ellipse (meter) 558
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 12
Circular confidence region, given by single value of horizontal uncertainty (meter) 710
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.06295
Epicentral distance of station farthest from the epicenter (degree) 1.3301
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 95742331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 13:24:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
TV.SF04.EHZ. 2021-09-22T13:16:57.52 1.0 positive manual P 175 1.3301 50 0.4 18
IV.RUFI.EHZ. 2021-09-22T13:16:45.22 0.6 undecidable manual S 181 0.3247 50 0.12 48
IV.CRMI.HHZ. 2021-09-22T13:16:44.41 1.0 undecidable manual P 227 0.5315 50 0.95 17
IV.BOSL.HHZ. 2021-09-22T13:16:43.35 0.6 undecidable manual S 204 0.2527 50 0.38 46
IV.FNVD.HHZ. 2021-09-22T13:16:43.95 0.6 undecidable manual S 271 0.2806 50 0.14 48
IV.BRIS.HHZ. 2021-09-22T13:16:41.16 0.6 undecidable manual S 71 0.1907 116 0.18 48
IV.MTRZ.HHE. 2021-09-22T13:16:41.52 0.6 undecidable manual S 337 0.1637 119 1.48 28
IV.ASQU.HHZ. 2021-09-22T13:16:41.29 0.1 undecidable manual P 152 0.4155 50 -0.19 92
IV.SEI.HHZ. 2021-09-22T13:16:40.13 0.6 undecidable manual S 226 0.1556 120 0.35 47
IV.SFI.EHZ. 2021-09-22T13:16:40.25 0.1 undecidable manual P 137 0.3516 50 -0.13 95
IV.LMD.HHZ. 2021-09-22T13:16:40.34 0.6 undecidable manual S 121 0.1628 119 0.34 47
IV.RUFI.EHZ. 2021-09-22T13:16:39.85 0.6 undecidable manual P 181 0.3247 50 -0.06 48
IV.MOCL.EHZ. 2021-09-22T13:16:39.05 0.1 undecidable manual P 237 0.2869 50 -0.22 94
IV.FNVD.HHZ. 2021-09-22T13:16:38.94 0.1 positive manual P 271 0.2806 50 -0.23 94
IV.BOSL.HHZ. 2021-09-22T13:16:38.74 0.1 undecidable manual P 204 0.2527 50 0.05 98
IV.BRIS.HHZ. 2021-09-22T13:16:37.41 0.1 positive manual P 71 0.1907 116 -0.13 98
IV.MTRZ.HHE. 2021-09-22T13:16:37.06 0.1 undecidable manual P 337 0.1637 119 0.07 99
IV.LMD.HHZ. 2021-09-22T13:16:36.86 0.6 negative manual P 121 0.1628 119 -0.11 49
IV.SEI.HHZ. 2021-09-22T13:16:36.88 0.1 positive manual P 226 0.1556 120 0.04 100
IV.VISG.HHZ. 2021-09-22T13:16:36.54 0.6 undecidable manual S 295 0.063 145 -0.57 45
IV.VISG.HHZ. 2021-09-22T13:16:34.95 0.1 undecidable manual P 295 0.063 145 -0.35 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:2.3 0.00283 0.18 AML other m 2021-09-22T13:16:36.58
IV.VISG.HHN. ML:2.4 0.003685 0.18 AML other m 2021-09-22T13:16:36.76
IV.SEI.HHN. ML:1.8 0.000645 0.28 AML other m 2021-09-22T13:16:40.56
IV.LMD.HHN. ML:1.3 0.000157 0.1 AML other m 2021-09-22T13:16:40.94
IV.SEI.HHE. ML:1.8 0.0004745 0.26 AML other m 2021-09-22T13:16:42.66
IV.BRIS.HHN. ML:1.8 0.000435 1.08 AML other m 2021-09-22T13:16:42.91
IV.LMD.HHE. ML:1.2 0.0001375 0.3 AML other m 2021-09-22T13:16:43.37
IV.BOSL.HHE. ML:1 5.65E-5 0.14 AML other m 2021-09-22T13:16:44.16
IV.FNVD.HHN. ML:1.7 0.0002125 0.14 AML other m 2021-09-22T13:16:44.49
IV.BRIS.HHE. ML:1.8 0.00043 1.2 AML other m 2021-09-22T13:16:44.33
IV.FNVD.HHE. ML:1.8 0.0002635 0.32 AML other m 2021-09-22T13:16:45.51
IV.MOCL.EHN. ML:1.2 6.805E-5 1.14 AML other m 2021-09-22T13:16:45.76
IV.MOCL.EHE. ML:1.2 6.635E-5 0.68 AML other m 2021-09-22T13:16:45.56
IV.BOSL.HHN. ML:1 5.09E-5 1.66 AML other m 2021-09-22T13:16:47.88
IV.SFI.EHN. ML:1.3 7.46E-5 0.42 AML other m 2021-09-22T13:16:47.33
IV.SFI.EHE. ML:1.2 4.815E-5 0.66 AML other m 2021-09-22T13:16:48.61
IV.ASQU.HHN. ML:1.2 5.08E-5 0.94 AML other m 2021-09-22T13:16:49.22
IV.ASQU.HHE. ML:1.2 4.445E-5 0.46 AML other m 2021-09-22T13:16:51.43
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