Earthquake with magnitude of ML 1.6 on date 05-10-2019 and time 23:48:26 (Italy) in region 4 km NW Riolo Terme (RA)

A magnitude ML 1.6 earthquake occured in region: 4 km NW Riolo Terme (RA), on

  • 05-10-2019 21:48:26 (UTC)
  • 05-10-2019 23:48:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.31, 11.7 at 22 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
Riolo Terme RA 4 5720 5720
Imola BO 5 69797 75517
Casalfiumanese BO 7 3438 78955
Dozza BO 8 6652 85607
Castel Bolognese RA 8 9554 95161
Borgo Tossignano BO 10 3288 98449
Brisighella RA 11 7639 106088
Casola Valsenio RA 12 2617 108705
Solarolo RA 13 4488 113193
Fontanelice BO 13 1943 115136
Mordano BO 13 4760 119896
Castel San Pietro Terme BO 13 20811 140707
Bagnara di Romagna RA 13 2429 143136
Castel Guelfo di Bologna BO 14 4455 147591
Faenza RA 15 58541 206132
Massa Lombarda RA 18 10653 216785
Modigliana FC 19 4560 221345
Medicina BO 19 16739 238084
Castel del Rio BO 19 1246 239330
Sant'Agata sul Santerno RA 19 2862 242192

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km S of Imola (69797 inhabitants)
15 Km W of Faenza (58541 inhabitants)
29 Km W of Forlì (117913 inhabitants)
35 Km SE of Bologna (386663 inhabitants)
41 Km W of Ravenna (159116 inhabitants)
47 Km W of Cesena (96758 inhabitants)
59 Km S of Ferrara (133155 inhabitants)
68 Km NE of Prato (191150 inhabitants)
70 Km NE of Firenze (382808 inhabitants)
72 Km SE of Modena (184973 inhabitants)
74 Km NE of Scandicci (50609 inhabitants)
74 Km W of Rimini (147750 inhabitants)
75 Km NE of Pistoia (90315 inhabitants)
83 Km SE of Carpi (70699 inhabitants)
85 Km S of Rovigo (51867 inhabitants)
95 Km N of Arezzo (99543 inhabitants)
95 Km E of Reggio nell'Emilia (171345 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 1.6 2019-10-05
21:48:26
44.31 11.7 22 2019-10-05
21:57:35
Sala Sismica INGV-Roma 73070591
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-10-05 21:48:26 ± 0.18
Latitude 44.31 ± 0.01
Longitude 11.70 ± 0.01
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73070591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 897
Semi-minor axis of confidence ellipse (meter) 386
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 900
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.05576
Epicentral distance of station farthest from the epicenter (degree) 0.56387
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 73070591
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-10-05 21:57:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2019-10-05T21:48:44.78 0.3 undecidable manual S 173 0.5189 103 0.58 62
IV.MOCL.EHZ. 2019-10-05T21:48:43.55 0.6 undecidable manual S 231 0.4838 104 0.38 44
IV.RUFI.EHZ. 2019-10-05T21:48:43.69 0.6 undecidable manual S 196 0.4937 104 0.22 45
IV.FNVD.HHZ. 2019-10-05T21:48:42.20 0.6 undecidable manual S 251 0.4389 106 0.31 45
IV.SFI.EHZ. 2019-10-05T21:48:41.94 0.6 undecidable manual S 166 0.4209 107 0.57 42
IV.SEI.HHZ. 2019-10-05T21:48:39.43 0.3 undecidable manual S 224 0.3561 110 -0.14 71
IV.MPPT.EHE. 2019-10-05T21:48:37.58 0.1 undecidable manual P 231 0.5639 102 0.31 87
IV.ASQU.HHZ. 2019-10-05T21:48:36.51 0.1 undecidable manual P 173 0.5189 103 -0.01 94
IV.ZCCA.HNE. 2019-10-05T21:48:36.28 0.1 undecidable manual P 274 0.5198 103 -0.25 90
IV.MTRZ.HHE. 2019-10-05T21:48:36.60 0.6 undecidable manual S 270 0.1979 128 1.17 34
IV.MOCL.EHZ. 2019-10-05T21:48:35.79 1.0 negative manual P 231 0.4838 104 -0.14 23
IV.RUFI.EHZ. 2019-10-05T21:48:35.57 0.1 undecidable manual P 196 0.4937 104 -0.53 85
IV.FNVD.HHZ. 2019-10-05T21:48:35.00 0.6 negative manual P 251 0.4389 106 -0.19 46
IV.SFI.EHZ. 2019-10-05T21:48:35.21 0.6 positive manual P 166 0.4209 107 0.32 45
IV.LMD.HHZ. 2019-10-05T21:48:35.76 0.6 undecidable manual S 179 0.2347 122 -0.57 43
IV.SEI.HHZ. 2019-10-05T21:48:33.51 0.1 undecidable manual P 224 0.3561 110 -0.34 91
IV.IMOL.EHZ. 2019-10-05T21:48:33.34 0.6 undecidable manual S 32 0.0558 162 0.41 48
IV.BRIS.HHZ. 2019-10-05T21:48:33.27 0.6 undecidable manual S 152 0.0998 149 -0.2 49
IV.BRSN.EHE. 2019-10-05T21:48:32.69 0.1 undecidable manual P 96 0.2725 118 0.16 96
IV.MTRZ.HHE. 2019-10-05T21:48:31.55 0.1 undecidable manual P 270 0.1979 128 0.09 99
IV.LMD.HHZ. 2019-10-05T21:48:31.39 0.6 negative manual P 179 0.2347 122 -0.59 44
IV.BRIS.HHZ. 2019-10-05T21:48:30.06 0.1 positive manual P 152 0.0998 149 -0.26 97
IV.IMOL.EHZ. 2019-10-05T21:48:29.87 0.1 undecidable manual P 32 0.0558 162 -0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:1.7 0.000325 0.3 AML other m 2019-10-05T21:48:38.21
IV.IMOL.HNE. ML:2.1 0.0009575 1.76 AML other m 2019-10-05T21:48:34.88
IV.IMOL.HNN. ML:1.8 0.0008425 1.2 AML other m 2019-10-05T21:48:35.87
IV.LMD.HHN. ML:1.7 0.000224 1.04 AML other m 2019-10-05T21:48:37.69
IV.LMD.HHE. ML:1.6 0.0001695 0.14 AML other m 2019-10-05T21:48:38.26
IV.SFI.EHE. ML:1.6 9.585E-5 0.76 AML other m 2019-10-05T21:48:42.62
IV.SFI.EHN. ML:1.5 7.33E-5 0.74 AML other m 2019-10-05T21:48:42.42
IV.FNVD.HHN. ML:1.8 0.00015 1.54 AML other m 2019-10-05T21:48:43.93
IV.FNVD.HHE. ML:1.8 0.000138 0.62 AML other m 2019-10-05T21:48:43.48
IV.MOCL.EHE. ML:1.5 6.615E-5 0.26 AML other m 2019-10-05T21:48:45.27
IV.ASQU.HHE. ML:1.5 5.79E-5 0.94 AML other m 2019-10-05T21:48:46.55
IV.MOCL.EHN. ML:1.4 5.825E-5 1.06 AML other m 2019-10-05T21:48:46.23
IV.ASQU.HHN. ML:1.4 5.345E-5 0.28 AML other m 2019-10-05T21:48:46.55
IV.BRIS.HNE. ML:1.7 0.00036075695 0.4736 AML other m 2019-10-05T21:48:33.61
IV.BRIS.HNN. ML:1.7 0.00032078555 1.1776 AML other m 2019-10-05T21:48:33.95
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