Earthquake with magnitude of ML 1.2 on date 17-09-2021 and time 22:05:27 (Italy) in region 7 km SE Russi (RA)

A magnitude ML 1.2 earthquake occured in region: 7 km SE 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) 44.317, 12.085 at 3 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
Russi RA 8 12247 12247
Forlì FC 11 117913 130160
Cotignola RA 14 7474 137634
Bagnacavallo RA 14 16739 154373
Ravenna RA 15 159116 313489
Forlimpopoli FC 15 13290 326779
Faenza RA 16 58541 385320
Lugo RA 18 32390 417710
Castrocaro Terme e Terra del Sole FC 19 6426 424136
Bertinoro FC 19 11059 435195
Fusignano RA 20 8222 443417
Solarolo RA 20 4488 447905

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km NE of Forlì (117913 inhabitants)
15 Km SW of Ravenna (159116 inhabitants)
16 Km E of Faenza (58541 inhabitants)
24 Km NW of Cesena (96758 inhabitants)
30 Km E of Imola (69797 inhabitants)
48 Km NW of Rimini (147750 inhabitants)
62 Km E of Bologna (386663 inhabitants)
69 Km SE of Ferrara (133155 inhabitants)
80 Km NW of Pesaro (94582 inhabitants)
87 Km S of Rovigo (51867 inhabitants)
90 Km NE of Firenze (382808 inhabitants)
91 Km NW of Fano (60888 inhabitants)
93 Km NE of Prato (191150 inhabitants)
95 Km NE of Scandicci (50609 inhabitants)
96 Km N of Arezzo (99543 inhabitants)
99 Km E of Modena (184973 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
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 ± 0.48
Latitude 44.3170 ± 0.0135
Longitude 12.0852 ± 0.0251
Depth (km) 3 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95558101

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1782
Semi-minor axis of confidence ellipse (meter) 1387
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 256
Circular confidence region, given by single value of horizontal uncertainty (meter) 1780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 282
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.56208
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 6
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance 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.FIR.HHZ. 2021-09-17T20:05:48.92 3.0 undecidable manual S -0.33 0
IV.ASQU.HHE. 2021-09-17T20:05:48.78 0.6 undecidable manual S 202 0.5621 50 0.14 48
IV.SFI.EHZ. 2021-09-17T20:05:45.35 0.6 undecidable manual S 203 0.4461 94 0.38 47
IV.LMD.HHZ. 2021-09-17T20:05:41.04 0.6 undecidable manual S 229 0.3615 94 -0.68 42
IV.ASQU.HHE. 2021-09-17T20:05:40.19 0.6 undecidable manual P 202 0.5621 50 0.37 45
IV.VISG.HHE. 2021-09-17T20:05:37.94 0.6 undecidable manual P 255 0.4829 50 -0.53 44
IV.SFI.EHZ. 2021-09-17T20:05:37.65 0.1 undecidable manual P 203 0.4461 94 -0.05 99
IV.IMOL.HNE. 2021-09-17T20:05:37.21 0.6 undecidable manual S 280 0.2482 96 -0.18 50
IV.BRIS.HHZ. 2021-09-17T20:05:37.67 0.3 undecidable manual S 248 0.2464 96 0.38 73
IV.LMD.HHZ. 2021-09-17T20:05:35.27 0.1 undecidable manual P 229 0.3615 94 -0.55 90
IV.IMOL.HNE. 2021-09-17T20:05:33.54 0.1 undecidable manual P 280 0.2482 96 0.22 100
IV.BRIS.HHZ. 2021-09-17T20:05:33.51 0.1 undecidable manual P 248 0.2464 96 0.25 100
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 6.06E-5 1.2 AML other m 2021-09-17T20:05:34.03
IV.BRIS.HHE. ML:1.2 8.62E-5 0.18 AML other m 2021-09-17T20:05:38.24
IV.LMD.HHN. ML:1.2 5.645E-5 0.14 AML other m 2021-09-17T20:05:41.73
IV.LMD.HHE. ML:1.1 4.604898E-5 0.1664 AML other m 2021-09-17T20:05:41.69
IV.BRIS.HNE. ML:1.2 9.402431E-5 0.4608 AML other m 2021-09-17T20:05:44.48
IV.BRIS.HNN. ML:1.5 0.00018686825 1.28 AML other m 2021-09-17T20:05:34.54
IV.SFI.EHE. ML:1 2.653973E-5 1.664 AML other m 2021-09-17T20:05:55.71
IV.SFI.EHN. ML:0.7 1.665789E-5 1.3184 AML other m 2021-09-17T20:06:01.02
IV.SFI.HNE. ML:1.7 0.0001394009 0.8832 AML other m 2021-09-17T20:05:41.96
IV.SFI.HNN. ML:1.8 0.0001821228 0.8832 AML other m 2021-09-17T20:06:03.10
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