Earthquake with magnitude of ML 1.1 on date 07-08-2019 and time 19:37:41 (UTC) in region 5 km N Marradi (FI)

A magnitude ML 1.1 earthquake occured in region: 5 km N Marradi (FI), on

  • 07-08-2019 19:37:41 (UTC)
  • 07-08-2019 21:37:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.12, 11.61 at 9 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
Marradi FI 5 3139 3139
Palazzuolo sul Senio FI 5 1154 4293
Tredozio FC 12 1212 5505
Casola Valsenio RA 12 2617 8122
Castel del Rio BO 14 1246 9368
Modigliana FC 15 4560 13928
Fontanelice BO 16 1943 15871
Portico e San Benedetto FC 17 756 16627
Brisighella RA 17 7639 24266
Borgo Tossignano BO 18 3288 27554
Firenzuola FI 18 4726 32280
Rocca San Casciano FC 20 1910 34190

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Imola (69797 inhabitants)
29 Km SW of Faenza (58541 inhabitants)
37 Km W of Forlì (117913 inhabitants)
47 Km SE of Bologna (386663 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
49 Km NE of Prato (191150 inhabitants)
51 Km W of Cesena (96758 inhabitants)
52 Km NE of Scandicci (50609 inhabitants)
58 Km SW of Ravenna (159116 inhabitants)
59 Km E of Pistoia (90315 inhabitants)
76 Km NW of Arezzo (99543 inhabitants)
77 Km W of Rimini (147750 inhabitants)
80 Km SE of Modena (184973 inhabitants)
80 Km S of Ferrara (133155 inhabitants)
91 Km N of Siena (53903 inhabitants)
94 Km E of Lucca (89046 inhabitants)
94 Km SE of Carpi (70699 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
Rev 100 ML 1.1 2019-08-07
19:37:41
44.12 11.61 9 2019-08-07
19:45:13
Sala Sismica INGV-Roma 71250731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-07 19:37:41 ± 0.11
Latitude 44.12 ± 0.01
Longitude 11.61 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71250731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 725
Semi-minor axis of confidence ellipse (meter) 597
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 338
Circular confidence region, given by single value of horizontal uncertainty (meter) 730
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.08094
Epicentral distance of station farthest from the epicenter (degree) 0.55578
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 71250731
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-07 19:45:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2019-08-07T19:37:55.32 0.1 undecidable manual S 158 0.3453 50 0.27 91
IV.MOCL.EHZ. 2019-08-07T19:37:54.53 0.6 undecidable manual S 250 0.3274 50 0.03 48
IV.IMOL.EHE. 2019-08-07T19:37:53.57 0.3 undecidable manual S 21 0.2608 108 1.08 50
IV.RUFI.EHZ. 2019-08-07T19:37:53.39 0.1 undecidable manual S 194 0.2878 50 0.05 97
IV.CRE.HHZ. 2019-08-07T19:37:53.20 0.3 undecidable manual P 153 0.5558 50 0.1 69
IV.SEI.HHZ. 2019-08-07T19:37:50.35 0.1 undecidable manual S 251 0.1898 114 0.41 95
IV.ASQU.HHZ. 2019-08-07T19:37:49.19 0.1 undecidable manual P 158 0.3453 50 -0.32 93
IV.RUFI.EHZ. 2019-08-07T19:37:48.24 0.1 undecidable manual P 194 0.2878 50 -0.28 95
IV.BRIS.HHE. 2019-08-07T19:37:48.60 0.6 undecidable manual S 46 0.1565 118 -0.16 49
IV.MOCL.EHZ. 2019-08-07T19:37:48.94 0.1 undecidable manual P 250 0.3274 50 -0.26 95
IV.MTRZ.HHE. 2019-08-07T19:37:47.58 0.3 undecidable manual P 326 0.2356 109 0.07 75
IV.IMOL.EHE. 2019-08-07T19:37:47.97 0.1 undecidable manual P 21 0.2608 108 -0.06 100
IV.LMD.HHE. 2019-08-07T19:37:46.93 0.1 undecidable manual S 119 0.0809 136 0.52 96
IV.SEI.HHZ. 2019-08-07T19:37:46.38 0.1 undecidable manual P 251 0.1898 114 -0.18 97
IV.BRIS.HHE. 2019-08-07T19:37:45.45 0.1 positive manual P 46 0.1565 118 -0.43 93
IV.LMD.HHE. 2019-08-07T19:37:44.19 0.1 positive manual P 119 0.0809 136 -0.34 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. ML:1.8 0.00054201815 0.32 AML other m 2019-08-07T19:37:53.41
IV.SEI.HHN. ML:2.3 0.001554294 0.2304 AML other m 2019-08-07T19:37:50.68
IV.RUFI.EHE. ML:1 5.1547717E-5 0.2816 AML other m 2019-08-07T19:37:53.82
IV.RUFI.EHN. ML:1 3.9163061E-5 0.1792 AML other m 2019-08-07T19:37:53.72
IV.MOCL.EHE. ML:1.3 8.0301495E-5 0.32 AML other m 2019-08-07T19:37:55.95
IV.MOCL.EHN. ML:1.2 6.0206485E-5 0.384 AML other m 2019-08-07T19:37:57.28
IV.ASQU.HHE. ML:1.1 4.5190165E-5 0.2176 AML other m 2019-08-07T19:37:55.95
IV.ASQU.HHN. ML:1.1 4.4533005E-5 0.32 AML other m 2019-08-07T19:37:57.05
IV.CRE.HHE. ML:1 1.7691715E-5 0.3584 AML other m 2019-08-07T19:38:09.00
IV.CRE.HHN. ML:1.1 2.622318E-5 0.2176 AML other m 2019-08-07T19:38:06.44
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