Earthquake with magnitude of ML 1.1 on date 11-05-2019 and time 18:23:40 (Italy) in region 4 km SE Marradi (FI)

A magnitude ML 1.1 earthquake occured in region: 4 km SE Marradi (FI), on

  • 11-05-2019 16:23:40 (UTC)
  • 11-05-2019 18:23:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.06, 11.65 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
Marradi FI 4 3139 3139
Tredozio FC 8 1212 4351
Palazzuolo sul Senio FI 10 1154 5505
Portico e San Benedetto FC 11 756 6261
Premilcuore FC 13 799 7060
San Godenzo FI 15 1167 8227
Rocca San Casciano FC 15 1910 10137
Modigliana FC 16 4560 14697
Casola Valsenio RA 19 2617 17314

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km SW of Faenza (58541 inhabitants)
33 Km S of Imola (69797 inhabitants)
36 Km SW of Forlì (117913 inhabitants)
45 Km NE of Firenze (382808 inhabitants)
48 Km W of Cesena (96758 inhabitants)
49 Km E of Prato (191150 inhabitants)
50 Km NE of Scandicci (50609 inhabitants)
55 Km SE of Bologna (386663 inhabitants)
59 Km SW of Ravenna (159116 inhabitants)
60 Km E of Pistoia (90315 inhabitants)
68 Km N of Arezzo (99543 inhabitants)
73 Km W of Rimini (147750 inhabitants)
86 Km NE of Siena (53903 inhabitants)
87 Km S of Ferrara (133155 inhabitants)
87 Km SE of Modena (184973 inhabitants)
95 Km E of Lucca (89046 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 2019-05-11
16:23:40
44.06 11.65 10 2019-05-11
16:34:37
Sala Sismica INGV-Roma 68447271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-05-11 16:23:40 ± 0.06
Latitude 44.06 ± 0.00
Longitude 11.65 ± 0.00
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 68447271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 285
Semi-minor axis of confidence ellipse (meter) 199
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.27969
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 68447271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-05-11 16:34:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LINA.HHZ. 2019-05-11T16:25:36.37 3.0 negative manual Pn 2.79 0
IT.AVL.HGZ. 2019-05-11T16:25:20.52 3.0 undecidable manual Sn 2.16 0
IT.MCLF.HNZ. 2019-05-11T16:25:13.32 3.0 undecidable manual Sg 12.31 0
IV.VITU.HNZ. 2019-05-11T16:25:08.70 3.0 undecidable manual Sn -2.83 0
CR.HVAR.HHZ. 2019-05-11T16:24:32.64 3.0 positive manual Pn 2.11 0
IV.MNTT.EHZ. 2019-05-11T16:24:26.44 3.0 undecidable manual S 0.62 0
IV.EUCT.HNZ. 2019-05-11T16:24:24.51 3.0 undecidable manual Pg 8.83 0
IT.VNF1.HGZ. 2019-05-11T16:24:23.10 3.0 positive manual Pn -0.04 0
IV.MNTV.HNZ. 2019-05-11T16:24:21.69 3.0 undecidable manual S -3.4 0
IV.MILN.HHZ. 2019-05-11T16:24:17.40 3.0 undecidable manual Pn 0.18 0
IV.OPPE.HNZ. 2019-05-11T16:24:08.93 3.0 undecidable manual P 4.63 0
IV.NDIM.HHZ. 2019-05-11T16:24:03.33 3.0 undecidable manual P 3.09 0
IV.EL6.EHZ. 2019-05-11T16:23:55.52 3.0 undecidable manual P -2.53 0
IV.ASQU.HHE. 2019-05-11T16:23:51.46 0.3 undecidable manual S 160 0.2797 50 0.18 72
IV.RUFI.EHZ. 2019-05-11T16:23:50.32 0.3 undecidable manual S 205 0.2437 110 0.12 74
IV.SEI.HHZ. 2019-05-11T16:23:49.15 0.1 undecidable manual S 269 0.2122 112 0.08 100
IV.BRIS.HHZ. 2019-05-11T16:23:48.25 0.1 undecidable manual S 26 0.1844 115 0.17 99
IV.SFI.EHE. 2019-05-11T16:23:48.88 0.3 undecidable manual S 138 0.2068 113 -0.01 76
IV.ASQU.HHE. 2019-05-11T16:23:46.51 0.1 undecidable manual P 160 0.2797 50 -0.1 98
IV.SFI.EHE. 2019-05-11T16:23:45.14 0.1 undecidable manual P 138 0.2068 113 -0.09 100
IV.SEI.HHZ. 2019-05-11T16:23:45.17 0.1 undecidable manual P 269 0.2122 112 -0.16 98
IV.RUFI.EHZ. 2019-05-11T16:23:45.99 0.3 undecidable manual P 205 0.2437 110 0 76
IV.BRIS.HHZ. 2019-05-11T16:23:44.66 0.1 undecidable manual P 26 0.1844 115 -0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:1.4 0.0004055 0.52 AML other m 2019-05-11T16:23:42.86
IV.LMD.HHE. ML:1.2 0.000268 0.64 AML other m 2019-05-11T16:23:42.54
IV.SEI.HHN. ML:1.1 8.115E-5 0.2 AML other m 2019-05-11T16:23:49.73
IV.SEI.HHE. ML:0.8 3.79E-5 1.64 AML other m 2019-05-11T16:23:50.89
IV.OPPE.HNN. ML:3.6 0.002095 0.58 AML other m 2019-05-11T16:24:09.19
IV.NDIM.HHN. ML:2.8 0.0005205 1.48 AML other m 2019-05-11T16:24:10.82
IV.OPPE.HNE. ML:3.4 0.00136 1.04 AML other m 2019-05-11T16:24:10.66
IV.NDIM.HHE. ML:3 0.0008125 1.54 AML other m 2019-05-11T16:24:11.81
IV.VITU.HHE. ML:2.9 5.075E-5 0.38 AML other m 2019-05-11T16:25:14.71
IV.VITU.HHN. ML:3 5.505E-5 1.1 AML other m 2019-05-11T16:25:33.36
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