Earthquake with magnitude of ML 1.1 on date 04-04-2020 and time 12:35:13 (UTC) in region 5 km E Loiano (BO)

A magnitude ML 1.1 earthquake occured in region: 5 km E Loiano (BO), on

  • 04-04-2020 12:35:13 (UTC)
  • 04-04-2020 14:35:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.26, 11.38 at 23 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
Loiano BO 5 4294 4294
Monghidoro BO 7 3749 8043
Monterenzio BO 7 6035 14078
Monzuno BO 9 6328 20406
Castel del Rio BO 11 1246 21652
San Benedetto Val di Sambro BO 13 4315 25967
Pianoro BO 14 17460 43427
Fontanelice BO 14 1943 45370
Firenzuola FI 16 4726 50096
Borgo Tossignano BO 17 3288 53384
Marzabotto BO 17 6779 60163
Grizzana Morandi BO 18 3916 64079
Sasso Marconi BO 18 14735 78814
Casalfiumanese BO 19 3438 82252
Casola Valsenio RA 20 2617 84869

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km S of Bologna (386663 inhabitants)
28 Km W of Imola (69797 inhabitants)
40 Km W of Faenza (58541 inhabitants)
48 Km NE of Prato (191150 inhabitants)
52 Km NE of Pistoia (90315 inhabitants)
53 Km W of Forlì (117913 inhabitants)
56 Km N of Firenze (382808 inhabitants)
56 Km SE of Modena (184973 inhabitants)
58 Km N of Scandicci (50609 inhabitants)
67 Km S of Ferrara (133155 inhabitants)
67 Km W of Ravenna (159116 inhabitants)
70 Km W of Cesena (96758 inhabitants)
70 Km SE of Carpi (70699 inhabitants)
77 Km SE of Reggio nell'Emilia (171345 inhabitants)
84 Km NE of Lucca (89046 inhabitants)
96 Km SW of Rovigo (51867 inhabitants)
97 Km W of Rimini (147750 inhabitants)
97 Km NW of Arezzo (99543 inhabitants)
99 Km NE of Pisa (89158 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 1.1 2020-04-04
12:35:13
44.26 11.38 23 2020-04-04
12:46:46
Sala Sismica INGV-Roma 77871411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-04 12:35:13 ± 0.51
Latitude 44.26 ± 0.01
Longitude 11.38 ± 0.03
Depth (km) 23 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77871411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1759
Semi-minor axis of confidence ellipse (meter) 1372
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 82
Circular confidence region, given by single value of horizontal uncertainty (meter) 1760
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 206
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.40829
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 77871411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-04 12:46:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RINC.HHZ. 2020-04-04T12:35:29.16 0.6 undecidable manual S 157 0.4083 109 0.51 42
IV.LMD.HHZ. 2020-04-04T12:35:25.31 0.3 undecidable manual S 128 0.2968 117 -0.29 68
IV.BRIS.HNZ. 2020-04-04T12:35:25.40 0.6 undecidable manual S 98 0.277 119 0.31 47
IV.SEI.HHZ. 2020-04-04T12:35:23.53 0.3 undecidable manual S 185 0.2086 128 0.14 71
IV.RINC.HHZ. 2020-04-04T12:35:22.55 0.6 undecidable manual P 157 0.4083 109 0.28 45
IV.MTRZ.HHZ. 2020-04-04T12:35:21.62 0.3 undecidable manual S 31 0.0585 162 0.84 63
IV.BRIS.HNZ. 2020-04-04T12:35:20.19 0.6 undecidable manual P 98 0.277 119 -0.02 48
IV.VISG.HHZ. 2020-04-04T12:35:20.32 0.3 undecidable manual S 153 0.0818 155 -0.71 63
IV.LMD.HHZ. 2020-04-04T12:35:20.15 0.1 undecidable manual P 128 0.2968 117 -0.36 91
IV.SEI.HHZ. 2020-04-04T12:35:19.34 0.1 undecidable manual P 185 0.2086 128 0.11 96
IV.VISG.HHZ. 2020-04-04T12:35:17.50 0.1 undecidable manual P 153 0.0818 155 -0.37 94
IV.MTRZ.HHZ. 2020-04-04T12:35:17.89 0.1 undecidable manual P 31 0.0585 162 0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.2 0.0001037 0.22 AML other m 2020-04-04T12:35:20.40
IV.VISG.HHN. ML:1 7.45E-5 0.1 AML other m 2020-04-04T12:35:20.91
IV.MTRZ.HHN. ML:1.3 0.0001455 0.28 AML other m 2020-04-04T12:35:21.80
IV.MTRZ.HHE. ML:1.2 0.0001018 0.52 AML other m 2020-04-04T12:35:22.42
IV.SEI.HHE. ML:1.1 6.065E-5 0.32 AML other m 2020-04-04T12:35:24.54
IV.CPGN.EHN. ML:2.1 0.0001433 1.58 AML other m 2020-04-04T12:35:42.07
IV.MTRZ.HNE. ML:1.1 8.6393125E-5 0.32 AML other m 2020-04-04T12:35:22.04
IV.MTRZ.HNN. ML:1.4 0.000153236155 0.7744 AML other m 2020-04-04T12:35:22.32
IV.SEI.HHN. ML:1.1 6.3429835E-5 0.4352 AML other m 2020-04-04T12:35:24.17
IV.LMD.HHE. ML:0.4 1.0091914E-5 0.1408 AML other m 2020-04-04T12:35:25.59
IV.LMD.HHN. ML:0.8 2.27956E-5 0.096 AML other m 2020-04-04T12:35:25.78
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