Earthquake with magnitude of ML 1.2 on date 17-09-2021 and time 20:05:27 (UTC) in region 1 km W Russi (RA)

A magnitude ML 1.2 earthquake occured in region: 1 km W Russi (RA), on

  • 17-09-2021 20:05:27 (UTC)
  • 17-09-2021 22:05:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.3750, 12.0190 at 22 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Russi RA 1 12247 12247
Bagnacavallo RA 6 16739 28986
Cotignola RA 6 7474 36460
Lugo RA 10 32390 68850
Fusignano RA 11 8222 77072
Solarolo RA 14 4488 81560
Sant'Agata sul Santerno RA 15 2862 84422
Faenza RA 15 58541 142963
Alfonsine RA 15 12038 155001
Ravenna RA 15 159116 314117
Bagnara di Romagna RA 15 2429 316546
Mordano BO 17 4760 321306
Forlì FC 17 117913 439219
Massa Lombarda RA 17 10653 449872
Castel Bolognese RA 19 9554 459426

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km NE of Faenza (58541 inhabitants)
15 Km W of Ravenna (159116 inhabitants)
17 Km N of Forlì (117913 inhabitants)
24 Km E of Imola (69797 inhabitants)
32 Km NW of Cesena (96758 inhabitants)
55 Km E of Bologna (386663 inhabitants)
56 Km NW of Rimini (147750 inhabitants)
60 Km SE of Ferrara (133155 inhabitants)
80 Km S of Rovigo (51867 inhabitants)
88 Km NW of Pesaro (94582 inhabitants)
91 Km NE of Firenze (382808 inhabitants)
92 Km NE of Prato (191150 inhabitants)
92 Km E of Modena (184973 inhabitants)
96 Km NE of Scandicci (50609 inhabitants)
99 Km NW of Fano (60888 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 1.2 2021-09-17
20:05:27
44.3752 12.019 22 2022-03-30
13:04:14
Bollettino Sismico Italiano INGV 97103861
Reviewed
Rev100
ML 1.2 2021-09-17
20:05:27
44.317 12.0852 3 2021-09-17
22:20:03
Sala Sismica INGV-Roma 95558101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-17 20:05:27 ± 0.2
Latitude 44.3752 ± 0.0099
Longitude 12.0190 ± 0.0101
Depth (km) 22 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97103861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 831
Semi-minor axis of confidence ellipse (meter) 804
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 190
Circular confidence region, given by single value of horizontal uncertainty (meter) 830.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 289
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.60075
Number of stations at which the event was observed 13
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 10
Type of magnitude ML
Reference to an origin 95558101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-17 22:20:03

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 97103861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-31 04:03:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ILOS.HHZ. 2021-09-17T20:06:57.06 3.0 undecidable manual Pn -0.89 0
IV.MMUR.HNZ. 2021-09-17T20:06:24.75 3.0 undecidable manual Sg 6.97 0
IV.OFFI.HHZ. 2021-09-17T20:06:10.87 3.0 undecidable manual Pg 10.53 0
IV.CPGN.EHZ. 2021-09-17T20:06:03.03 3.0 undecidable manual Sn 0.11 0
IV.ASQU.HHE. 2021-09-17T20:05:48.49 1.0 undecidable manual S 196 66.6777 101 0.3 23
IV.FIR.HHZ. 2021-09-17T20:05:48.92 3.0 undecidable manual S -0.33 0
IV.SFI.EHZ. 2021-09-17T20:05:45.04 0.6 undecidable manual S 195 53.9016 104 0.17 47
IV.VISG.HHE. 2021-09-17T20:05:44.24 0.6 undecidable manual S 246 50.8158 105 0.18 48
IV.LMD.HHZ. 2021-09-17T20:05:41.44 0.3 undecidable manual S 217 41.3253 110 -0.19 72
IV.PARC.HHZ. 2021-09-17T20:05:39.90 3.0 undecidable manual P 0
IV.ASQU.HHE. 2021-09-17T20:05:39.49 0.3 undecidable manual P 196 66.6777 101 -0.02 71
IV.BRIS.HHZ. 2021-09-17T20:05:37.90 0.3 undecidable manual S 230 26.0517 122 -0.07 76
IV.SFI.EHZ. 2021-09-17T20:05:37.65 0.1 undecidable manual P 195 53.9016 104 0.06 97
IV.IMOL.HNE. 2021-09-17T20:05:37.21 0.6 undecidable manual S 266 21.9669 128 0.13 50
IV.VISG.HHE. 2021-09-17T20:05:37.42 0.6 undecidable manual P 246 50.8158 105 0.3 47
IV.LMD.HHZ. 2021-09-17T20:05:35.46 0.3 undecidable manual P 217 41.3253 110 -0.26 71
IV.BRIS.HHZ. 2021-09-17T20:05:33.51 0.1 undecidable manual P 230 26.0517 122 -0.1 100
IV.IMOL.HNE. 2021-09-17T20:05:33.08 0.3 undecidable manual P 266 21.9669 128 -0.01 77
IV.NDIM.HHZ. 2021-09-17T20:05:28.45 3.0 undecidable manual S -0.24 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHN. ML:1.1 0.0000606 1.2 AML other m 2021-09-17T20:05:34.03
IV.BRIS.HHE. ML:1.3 0.0000862 0.18 AML other m 2021-09-17T20:05:38.24
IV.LMD.HHE. ML:0.0 0.000046048980000000004 0.1664 AML other m 2021-09-17T20:05:41.69
IV.LMD.HHN. ML:0.0 0.00005646089 0.1408 AML other m 2021-09-17T20:05:41.73
IV.SFI.EHE. ML:1.0 0.000020624145 0.128 AML other m 2021-09-17T20:05:46.07
IV.SFI.EHN. ML:0.8 0.000016657889999999998 0.6816 AML other m 2021-09-17T20:06:00.02
IV.SFI.HNN. ML:1.8 0.00012992175 0.6912 AML other m 2021-09-17T20:05:44.15
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