Earthquake with magnitude of ML 1.9 on date 28-02-2021 and time 15:35:15 (Italy) in region 2 km NW Gaggio Montano (BO)

A magnitude ML 1.9 earthquake occured in region: 2 km NW Gaggio Montano (BO), on

  • 28-02-2021 14:35:15 (UTC)
  • 28-02-2021 15:35:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.22, 10.92 at 56 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
Gaggio Montano BO 2 4878 4878
Montese MO 6 3353 8231
Lizzano in Belvedere BO 6 2212 10443
Alto Reno Terme BO 8 6960 17403
Castel d'Aiano BO 10 1906 19309
Fanano MO 10 2989 22298
Castel di Casio BO 11 3448 25746
Sestola MO 12 2508 28254
Sambuca Pistoiese PT 14 1626 29880
Camugnano BO 14 1885 31765
Pavullo nel Frignano MO 15 17383 49148
Zocca MO 16 4719 53867
Montecreto MO 16 940 54807
Vergato BO 17 7639 62446
Cutigliano PT 18 1488 63934
Lama Mocogno MO 18 2734 66668
Grizzana Morandi BO 19 3916 70584

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km N of Pistoia (90315 inhabitants)
40 Km NW of Prato (191150 inhabitants)
46 Km SW of Bologna (386663 inhabitants)
48 Km S of Modena (184973 inhabitants)
53 Km NE of Lucca (89046 inhabitants)
55 Km NW of Scandicci (50609 inhabitants)
57 Km NW of Firenze (382808 inhabitants)
58 Km SE of Reggio nell'Emilia (171345 inhabitants)
63 Km S of Carpi (70699 inhabitants)
65 Km E of Massa (69479 inhabitants)
65 Km W of Imola (69797 inhabitants)
66 Km NE of Viareggio (62467 inhabitants)
67 Km E of Carrara (63133 inhabitants)
69 Km NE of Pisa (89158 inhabitants)
77 Km W of Faenza (58541 inhabitants)
80 Km SE of Parma (192836 inhabitants)
88 Km E of La Spezia (93959 inhabitants)
89 Km NE of Livorno (159219 inhabitants)
89 Km SW of Ferrara (133155 inhabitants)
89 Km W of Forlì (117913 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 1.9 2021-02-28
14:35:15
44.22 10.92 56 2021-02-28
14:44:10
Sala Sismica INGV-Roma 87574271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-28 14:35:15 ± 0.25
Latitude 44.22 ± 0.02
Longitude 10.92 ± 0.01
Depth (km) 56 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87574271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1567
Semi-minor axis of confidence ellipse (meter) 738
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 1570
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 28
Number of defining phases 26
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) 0.14029
Epicentral distance of station farthest from the epicenter (degree) 0.58186
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 24
Type of magnitude ML
Reference to an origin 87574271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-28 14:44:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LMD.HHZ. 2021-02-28T14:35:39.44 3.0 undecidable manual S 104 0.5819 120 1.55 0
IV.PII.HHZ. 2021-02-28T14:35:37.18 0.6 undecidable manual S 210 0.5702 120 -0.47 43
GU.EQUI.HHZ. 2021-02-28T14:35:37.59 0.6 undecidable manual S 265 0.5522 121 0.31 44
IV.MTRZ.HHZ. 2021-02-28T14:35:35.66 3.0 undecidable manual S 75 0.3741 135 1.73 0
MN.VLC.HHZ. 2021-02-28T14:35:34.65 0.6 undecidable manual S 262 0.3867 134 0.51 43
IV.MOCL.EHZ. 2021-02-28T14:35:33.24 0.6 undecidable manual S 138 0.2824 144 0.74 40
IV.VISG.HHZ. 2021-02-28T14:35:33.87 0.6 undecidable manual S 94 0.3696 136 0.02 49
IV.MPPT.EHE. 2021-02-28T14:35:32.56 0.6 undecidable manual S 155 0.286 144 0 49
GU.GSCL.HHZ. 2021-02-28T14:35:31.87 0.6 undecidable manual S 300 0.2725 145 -0.5 47
IV.ZCCA.HHZ. 2021-02-28T14:35:31.62 0.3 undecidable manual S 17 0.1403 161 0.68 61
GU.POPM.HHZ. 2021-02-28T14:35:31.68 0.3 undecidable manual S 214 0.2068 153 0.12 73
IV.FNVD.HHZ. 2021-02-28T14:35:30.28 0.3 undecidable manual S 108 0.1538 159 -0.76 66
IV.LMD.HHZ. 2021-02-28T14:35:29.08 0.6 negative manual P 104 0.5819 120 0.62 42
IV.PII.HHZ. 2021-02-28T14:35:28.35 0.3 positive manual P 210 0.5702 120 0.03 71
GU.EQUI.HHZ. 2021-02-28T14:35:28.60 0.3 positive manual P 265 0.5522 121 0.5 65
GU.MAIM.HHE. 2021-02-28T14:35:27.03 0.1 undecidable manual P 226 0.4317 130 0.27 93
MN.VLC.HHZ. 2021-02-28T14:35:26.31 1.0 positive manual P 262 0.3867 134 0.01 25
IV.MTRZ.HHZ. 2021-02-28T14:35:26.63 0.1 positive manual P 75 0.3741 135 0.46 90
GU.SARM.EHE. 2021-02-28T14:35:26.22 0.1 undecidable manual P 265 0.3732 135 0.05 98
IV.MOCL.EHZ. 2021-02-28T14:35:25.60 0.1 undecidable manual P 138 0.2824 144 0.25 96
IV.VISG.HHZ. 2021-02-28T14:35:25.79 0.6 undecidable manual P 94 0.3696 136 -0.34 46
GU.CARD.HHZ. 2021-02-28T14:35:25.91 0.1 positive manual P 239 0.3669 136 -0.19 95
IV.BDI.HNZ. 2021-02-28T14:35:25.05 0.1 undecidable manual P 237 0.2788 145 -0.27 95
IV.MPPT.EHE. 2021-02-28T14:35:25.42 0.1 undecidable manual P 155 0.286 144 0.04 100
GU.POPM.HHZ. 2021-02-28T14:35:24.68 0.1 undecidable manual P 214 0.2068 153 -0.13 99
GU.GSCL.HHZ. 2021-02-28T14:35:24.91 0.1 undecidable manual P 300 0.2725 145 -0.37 94
IV.ZCCA.HHZ. 2021-02-28T14:35:24.14 0.1 undecidable manual P 17 0.1403 161 -0.31 98
IV.FNVD.HHZ. 2021-02-28T14:35:23.88 0.1 undecidable manual P 108 0.1538 159 -0.63 89
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ZCCA.HHE. ML:0 0.0005415 0.4 AML other m 2021-02-28T14:35:32.60
IV.ZCCA.HHN. ML:0 0.000375 0.44 AML other m 2021-02-28T14:35:32.57
IV.VISG.HHN. ML:1.7 9.32E-5 1.4 AML other m 2021-02-28T14:35:35.96
IV.VISG.HHE. ML:1.6 6.975E-5 0.48 AML other m 2021-02-28T14:35:35.41
GU.CARD.HHE. ML:2.2 0.0002935 0.42 AML other m 2021-02-28T14:35:36.45
GU.CARD.HHN. ML:2.3 0.000357 0.14 AML other m 2021-02-28T14:35:36.68
IV.PII.HHE. ML:2 0.0001385 0.26 AML other m 2021-02-28T14:35:37.38
IV.PII.HHN. ML:1.9 0.0001125 0.98 AML other m 2021-02-28T14:35:37.39
IV.MTRZ.HHE. ML:0 0.000164 1.02 AML other m 2021-02-28T14:35:39.89
IV.MTRZ.HHN. ML:0 0.000202 0.5 AML other m 2021-02-28T14:35:40.03
IV.MTRZ.HNE. ML:0 0.00016415058 0.9792 AML other m 2021-02-28T14:35:36.83
IV.MTRZ.HNN. ML:0 0.00017101635 0.7296 AML other m 2021-02-28T14:35:36.38
IV.ZCCA.HNE. ML:2.4 0.0005867713 0.3968 AML other m 2021-02-28T14:35:32.60
IV.ZCCA.HNN. ML:2.2 0.0003261484 0.4224 AML other m 2021-02-28T14:35:33.16
IV.MOCL.EHE. ML:1.9 0.0001618471 0.2816 AML other m 2021-02-28T14:35:33.53
IV.MOCL.EHN. ML:1.7 9.667651E-5 0.9792 AML other m 2021-02-28T14:35:33.28
MN.VLC.HHE. ML:1.4 4.5227435E-5 0.384 AML other m 2021-02-28T14:35:35.64
MN.VLC.HHN. ML:1.2 3.173832E-5 0.224 AML other m 2021-02-28T14:35:35.33
MN.VLC.HNE. ML:1.6 7.6511135E-5 0.6208 AML other m 2021-02-28T14:35:35.80
MN.VLC.HNN. ML:1.6 5.926523E-5 0.3968 AML other m 2021-02-28T14:35:35.58
GU.EQUI.HHE. ML:1.4 3.5400335E-5 0.1856 AML other m 2021-02-28T14:35:40.33
GU.EQUI.HHN. ML:1.2 1.902463E-5 0.4416 AML other m 2021-02-28T14:35:39.46
IV.LMD.HHE. ML:1.6 5.300842E-5 0.2176 AML other m 2021-02-28T14:35:41.46
IV.LMD.HHN. ML:1.6 5.6485325E-5 0.5632 AML other m 2021-02-28T14:35:42.08
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