Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-02-2022 and time 15:18:16 (Italy) in region 2 km NW Riolo Terme (RA)

A magnitude ML 1.3 earthquake occured in region: 2 km NW Riolo Terme (RA), on

  • 18-02-2022 14:18:16 (UTC)
  • 18-02-2022 15:18:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2940, 11.7180 at 26 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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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 2 5720 5720
Imola BO 7 69797 75517
Castel Bolognese RA 7 9554 85071
Casalfiumanese BO 8 3438 88509
Brisighella RA 9 7639 96148
Dozza BO 10 6652 102800
Borgo Tossignano BO 10 3288 106088
Casola Valsenio RA 11 2617 108705
Solarolo RA 13 4488 113193
Faenza RA 13 58541 171734
Fontanelice BO 13 1943 173677
Bagnara di Romagna RA 14 2429 176106
Mordano BO 14 4760 180866
Castel San Pietro Terme BO 16 20811 201677
Castel Guelfo di Bologna BO 16 4455 206132
Modigliana FC 16 4560 210692
Castel del Rio BO 19 1246 211938
Massa Lombarda RA 19 10653 222591

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km S of Imola (69797 inhabitants)
13 Km W of Faenza (58541 inhabitants)
27 Km W of Forlì (117913 inhabitants)
37 Km SE of Bologna (386663 inhabitants)
41 Km W of Ravenna (159116 inhabitants)
45 Km W of Cesena (96758 inhabitants)
61 Km S of Ferrara (133155 inhabitants)
68 Km NE of Prato (191150 inhabitants)
69 Km NE of Firenze (382808 inhabitants)
73 Km W of Rimini (147750 inhabitants)
73 Km NE of Scandicci (50609 inhabitants)
74 Km SE of Modena (184973 inhabitants)
75 Km NE of Pistoia (90315 inhabitants)
85 Km SE of Carpi (70699 inhabitants)
87 Km S of Rovigo (51867 inhabitants)
93 Km N of Arezzo (99543 inhabitants)
97 Km E of Reggio nell'Emilia (171345 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.3 2022-02-18
14:18:16		 44.2943 11.7178 26 2022-07-08
12:33:53		 Bollettino Sismico Italiano INGV 104265431
Reviewed
Rev100 		ML 1.2 2022-02-18
14:18:17		 44.246 11.6627 28 2022-02-18
14:35:00		 Sala Sismica INGV-Roma 101112381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-02-18 14:18:16 ± 0.45
Latitude 44.2943 ± 0.0153
Longitude 11.7178 ± 0.0176
Depth (km) 26 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 104265431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1604
Semi-minor axis of confidence ellipse (meter) 714
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 175
Circular confidence region, given by single value of horizontal uncertainty (meter) 1600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 138
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 12
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35163
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 101112381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-02-18 14:35:00

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 104265431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-05-06 14:01:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.KBN.HHZ. 2022-02-18T14:20:07.63 3.0 undecidable manual Pn 4.72 0
MN.PDG.HHZ. 2022-02-18T14:20:01.81 3.0 undecidable manual Pg 25.16 0
IV.VAGA.HHZ. 2022-02-18T14:19:51.51 3.0 undecidable manual Sn -1.34 0
IV.MCEL.HHZ. 2022-02-18T14:19:50.46 3.0 undecidable manual Pg 21.389999 0
OT.TAR1.HHZ. 2022-02-18T14:19:49.07 3.0 undecidable manual Pg 12.96 0
IV.LRP.EHZ. 2022-02-18T14:19:44.25 3.0 undecidable manual Sn 1.23 0
GU.CANO.HHZ. 2022-02-18T14:19:37.74 3.0 undecidable manual Sg 5.75 0
CR.STON.BHZ. 2022-02-18T14:19:21.26 3.0 negative manual Pn 1.55 0
GU.RORO.HHZ. 2022-02-18T14:19:20.04 3.0 undecidable manual Sn -9.99 0
GU.SATI.HHZ. 2022-02-18T14:19:11.43 3.0 positive manual Pg 9.3 0
IV.RCAV.EHZ. 2022-02-18T14:19:00.79 3.0 undecidable manual Pg 2.7 0
IV.BARO.EHZ. 2022-02-18T14:18:49.34 3.0 undecidable manual Pn -2.23 0
OX.MARN.HHZ. 2022-02-18T14:18:45.42 3.0 undecidable manual Sg -6.62 0
IV.FOSV.EHZ. 2022-02-18T14:18:37.02 3.0 undecidable manual Pn -1.46 0
IV.SEI.HHZ. 2022-02-18T14:18:31.27 0.6 undecidable manual S 227 39.0276 117 0.63 42
IV.ZEN8.EHZ. 2022-02-18T14:18:30.38 3.0 undecidable manual P -6.42 0
IV.LMD.HHZ. 2022-02-18T14:18:27.35 0.6 undecidable manual S 182 24.0537 132 0.03 49
IV.MTRZ.HHE. 2022-02-18T14:18:27.60 0.6 undecidable manual S 275 23.3544 133 0.42 46
IV.VISG.HHZ. 2022-02-18T14:18:26.84 0.3 undecidable manual S 243 25.3524 130 -0.75 60
IV.SEI.HHZ. 2022-02-18T14:18:25.01 0.3 undecidable manual P 227 39.0276 117 0.25 69
IV.BRIS.HNZ. 2022-02-18T14:18:24.96 0.6 undecidable manual S 153 8.6802 159 -0.01 51
IV.IMOL.EHZ. 2022-02-18T14:18:24.83 0.6 undecidable manual S 15 7.4814 162 -0.04 50
IV.MTRZ.HHE. 2022-02-18T14:18:23.09 0.1 undecidable manual P 275 23.3544 133 0.32 93
IV.LMD.HHZ. 2022-02-18T14:18:22.84 0.1 undecidable manual P 182 24.0537 132 -0.01 99
IV.VISG.HHZ. 2022-02-18T14:18:22.51 0.1 undecidable manual P 243 25.3524 130 -0.49 89
IV.IMOL.EHZ. 2022-02-18T14:18:21.35 0.1 undecidable manual P 15 7.4814 162 -0.08 100
IV.BRIS.HNZ. 2022-02-18T14:18:21.58 0.3 undecidable manual P 153 8.6802 159 0.09 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0.9 0.000037078435 0.256 AML other m 2022-02-18T14:18:27.51
IV.VISG.HHN. ML:1.3 0.00007255 0.24 AML other m 2022-02-18T14:18:28.51
IV.VISG.HHE. ML:1.2 0.00007235 0.48 AML other m 2022-02-18T14:18:28.30
IV.LMD.HHN. ML:1.1 0.000056204470000000005 0.1856 AML other m 2022-02-18T14:18:28.75
IV.SEI.HHE. ML:1.4 0.000079908805 0.3584 AML other m 2022-02-18T14:18:31.40
IV.SEI.HHN. ML:1.8 0.00019700000000000002 0.3 AML other m 2022-02-18T14:18:31.86
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download