Earthquake with magnitude of ML 1.8 on date 14-10-2021 and time 01:20:57 (Italy) in region 5 km E Monghidoro (BO)

A magnitude ML 1.8 earthquake occured in region: 5 km E Monghidoro (BO), on

  • 13-10-2021 23:20:57 (UTC)
  • 14-10-2021 01:20:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.226, 11.374 at 18 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
Monghidoro BO 5 3749 3749
Loiano BO 6 4294 8043
Monzuno BO 10 6328 14371
Castel del Rio BO 11 1246 15617
San Benedetto Val di Sambro BO 11 4315 19932
Monterenzio BO 11 6035 25967
Firenzuola FI 12 4726 30693
Fontanelice BO 15 1943 32636
Pianoro BO 18 17460 50096
Grizzana Morandi BO 18 3916 54012
Borgo Tossignano BO 18 3288 57300
Marzabotto BO 19 6779 64079
Palazzuolo sul Senio FI 19 1154 65233
Castiglione dei Pepoli BO 20 5648 70881
Casola Valsenio RA 20 2617 73498

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km S of Bologna (386663 inhabitants)
31 Km W of Imola (69797 inhabitants)
41 Km W of Faenza (58541 inhabitants)
44 Km NE of Prato (191150 inhabitants)
49 Km NE of Pistoia (90315 inhabitants)
52 Km N of Firenze (382808 inhabitants)
53 Km W of Forlì (117913 inhabitants)
54 Km N of Scandicci (50609 inhabitants)
59 Km SE of Modena (184973 inhabitants)
69 Km W of Ravenna (159116 inhabitants)
70 Km W of Cesena (96758 inhabitants)
71 Km S of Ferrara (133155 inhabitants)
73 Km SE of Carpi (70699 inhabitants)
79 Km SE of Reggio nell'Emilia (171345 inhabitants)
82 Km NE of Lucca (89046 inhabitants)
94 Km NW of Arezzo (99543 inhabitants)
96 Km NE of Pisa (89158 inhabitants)
97 Km W of Rimini (147750 inhabitants)
98 Km E of Viareggio (62467 inhabitants)
100 Km SW of Rovigo (51867 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 1.8 2021-10-13
23:20:57
44.2265 11.3737 18 2021-10-13
23:28:47
Sala Sismica INGV-Roma 96519271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-13 23:20:57 ± 0.2
Latitude 44.2265 ± 0.0117
Longitude 11.3737 ± 0.0100
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96519271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1079
Semi-minor axis of confidence ellipse (meter) 765
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 11
Circular confidence region, given by single value of horizontal uncertainty (meter) 1080
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.52341
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96519271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-13 23:28:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2021-10-13T23:21:46.70 3.0 undecidable manual Sg 3.4 0
IV.EL6.EHZ. 2021-10-13T23:21:24.85 3.0 undecidable manual Pn 1.06 0
IV.MURB.HHZ. 2021-10-13T23:21:20.04 3.0 undecidable manual P -0.12 0
IV.SFI.EHZ. 2021-10-13T23:21:14.64 0.6 undecidable manual S 133 0.4676 100 0.65 40
IV.ZCCA.HHZ. 2021-10-13T23:21:09.12 0.6 undecidable manual S 294 0.3103 107 -0.31 45
IV.BRIS.HHZ. 2021-10-13T23:21:09.46 0.6 undecidable manual S 90 0.2815 109 0.84 37
GU.POPM.HHZ. 2021-10-13T23:21:08.38 3.0 positive manual P 0.81 0
IV.ASQU.HHZ. 2021-10-13T23:21:07.98 0.1 undecidable manual P 145 0.5234 98 0.01 91
IV.FNVD.HHZ. 2021-10-13T23:21:06.61 0.1 undecidable manual S 252 0.1889 121 0.48 89
IV.FIU.EHE. 2021-10-13T23:21:06.78 0.6 undecidable manual P 11 0.4218 101 0.53 41
IV.SEI.HHZ. 2021-10-13T23:21:06.02 0.6 undecidable manual S 184 0.1727 124 0.31 46
IV.SFI.EHZ. 2021-10-13T23:21:06.86 0.1 undecidable manual P 133 0.4676 100 -0.17 89
IV.ZCCA.HHZ. 2021-10-13T23:21:04.69 0.3 undecidable manual P 294 0.3103 107 0.29 68
IV.VISG.HHZ. 2021-10-13T23:21:03.45 0.1 undecidable manual S 131 0.0576 157 -0.05 100
IV.BRIS.HHZ. 2021-10-13T23:21:03.76 0.1 positive manual P 90 0.2815 109 -0.17 93
IV.IMOL.EHZ. 2021-10-13T23:21:03.90 0.3 undecidable manual P 63 0.2959 108 -0.26 69
IV.SEI.HHZ. 2021-10-13T23:21:02.13 0.1 undecidable manual P 184 0.1727 124 -0.12 95
IV.FNVD.HHZ. 2021-10-13T23:21:02.16 0.1 undecidable manual P 252 0.1889 121 -0.33 90
IV.VISG.HHZ. 2021-10-13T23:21:00.53 0.1 positive manual P 131 0.0576 157 -0.44 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHN. ML:1.9 0.00076 0.42 AML other m 2021-10-13T23:21:03.52
IV.VISG.HHE. ML:2 0.000866 0.34 AML other m 2021-10-13T23:21:03.63
IV.SEI.HHE. ML:2.4 0.001455 0.4 AML other m 2021-10-13T23:21:06.55
IV.SEI.HHN. ML:2.7 0.003 0.22 AML other m 2021-10-13T23:21:06.87
IV.FNVD.HHE. ML:1.8 0.0003935 0.24 AML other m 2021-10-13T23:21:07.39
IV.FNVD.HHN. ML:1.9 0.0005215 0.1 AML other m 2021-10-13T23:21:07.47
IV.BRIS.HHN. ML:1.9 0.000362 0.3 AML other m 2021-10-13T23:21:10.49
IV.BRIS.HHE. ML:1.9 0.0003095 1.26 AML other m 2021-10-13T23:21:13.89
IV.SFI.EHN. ML:1.6 8.725E-5 1.62 AML other m 2021-10-13T23:21:17.09
IV.ASQU.HHE. ML:1.6 9.015E-5 0.24 AML other m 2021-10-13T23:21:17.66
IV.SFI.EHE. ML:1.5 8.215E-5 0.36 AML other m 2021-10-13T23:21:18.81
IV.ASQU.HHN. ML:1.5 6.81E-5 0.74 AML other m 2021-10-13T23:21:19.16
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