Earthquake with magnitude of ML 1.4 on date 08-07-2020 and time 03:20:42 (Italy) in region 8 km SE Casola Valsenio (RA)

A magnitude ML 1.4 earthquake occured in region: 8 km SE Casola Valsenio (RA), on

  • 08-07-2020 01:20:42 (UTC)
  • 08-07-2020 03:20:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.16, 11.68 at 32 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
Casola Valsenio RA 8 2617 2617
Modigliana FC 9 4560 7177
Brisighella RA 10 7639 14816
Tredozio FC 10 1212 16028
Marradi FI 10 3139 19167
Palazzuolo sul Senio FI 11 1154 20321
Riolo Terme RA 14 5720 26041
Fontanelice BO 15 1943 27984
Borgo Tossignano BO 15 3288 31272
Castel del Rio BO 15 1246 32518
Casalfiumanese BO 16 3438 35956
Portico e San Benedetto FC 17 756 36712
Rocca San Casciano FC 17 1910 38622
Dovadola FC 17 1653 40275

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km SW of Faenza (58541 inhabitants)
22 Km S of Imola (69797 inhabitants)
30 Km W of Forlì (117913 inhabitants)
45 Km W of Cesena (96758 inhabitants)
46 Km SE of Bologna (386663 inhabitants)
51 Km SW of Ravenna (159116 inhabitants)
55 Km NE of Firenze (382808 inhabitants)
56 Km NE of Prato (191150 inhabitants)
59 Km NE of Scandicci (50609 inhabitants)
66 Km E of Pistoia (90315 inhabitants)
72 Km W of Rimini (147750 inhabitants)
76 Km S of Ferrara (133155 inhabitants)
79 Km N of Arezzo (99543 inhabitants)
81 Km SE of Modena (184973 inhabitants)
94 Km SE of Carpi (70699 inhabitants)
97 Km N of Siena (53903 inhabitants)
100 Km E of Lucca (89046 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 1.4 2020-07-08
01:20:42
44.16 11.68 32 2020-11-19
12:36:55
Bollettino Sismico Italiano INGV 81509591
Reviewed
Rev100
ML 1.3 2020-07-08
01:20:43
44.18 11.62 27 2020-07-08
01:27:20
Sala Sismica INGV-Roma 80869751
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-08 01:20:42 ± 0.59
Latitude 44.16 ± 0.03
Longitude 11.68 ± 0.03
Depth (km) 32 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 81509591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2918
Semi-minor axis of confidence ellipse (meter) 1517
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 345
Circular confidence region, given by single value of horizontal uncertainty (meter) 2920
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.43
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 0.25091
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 81509591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-07-31 16:18:26

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 80869751
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-08 01:27:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SEI.HHZ. 2020-07-08T01:20:55.03 0.6 undecidable manual S 246 0.2509 135 0.05 48
IV.MTRZ.HNN. 2020-07-08T01:20:55.54 0.6 undecidable manual S 311 0.2374 137 0.84 38
IV.RONT.HHZ. 2020-07-08T01:20:55.32 0.6 undecidable manual S 227 0.2401 136 0.56 42
IV.LMD.HHZ. 2020-07-08T01:20:52.18 0.6 undecidable manual S 165 0.0836 162 -0.17 49
IV.VISG.HHZ. 2020-07-08T01:20:52.25 0.6 undecidable manual S 280 0.1763 145 -1.31 31
IV.BRIS.HHZ. 2020-07-08T01:20:52.65 0.6 undecidable manual S 44 0.0926 160 0.22 48
IV.RONT.HHZ. 2020-07-08T01:20:49.94 0.1 positive manual P 227 0.2401 136 0.31 90
IV.SEI.HHZ. 2020-07-08T01:20:49.76 0.3 undecidable manual P 246 0.2509 135 0 72
IV.MTRZ.HNN. 2020-07-08T01:20:49.88 0.3 undecidable manual P 311 0.2374 137 0.29 69
IV.LMD.HHZ. 2020-07-08T01:20:48.11 0.1 undecidable manual P 165 0.0836 162 -0.12 98
IV.VISG.HHZ. 2020-07-08T01:20:48.23 0.1 undecidable manual P 280 0.1763 145 -0.7 82
IV.BRIS.HHZ. 2020-07-08T01:20:48.29 0.1 negative manual P 44 0.0926 160 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.1 4.5163565E-5 0.16 AML other m 2020-07-08T01:20:52.36
IV.LMD.HHE. ML:0.9 4.164438E-5 0.32 AML other m 2020-07-08T01:20:52.57
IV.VISG.HHN. ML:1.2 7.2133545E-5 0.12 AML other m 2020-07-08T01:20:52.49
IV.LMD.HHN. ML:1.2 7.336218E-5 0.1 AML other m 2020-07-08T01:20:52.54
IV.BRIS.HHE. ML:1.8 0.00028123655 1.88 AML other m 2020-07-08T01:20:53.01
IV.BRIS.HHN. ML:1.7 0.0002459278 0.28 AML other m 2020-07-08T01:20:53.02
IV.BRIS.HNN. ML:1.7 0.00021543015 0.8 AML other m 2020-07-08T01:20:54.60
IV.RONT.HHE. ML:1.5 0.000108368545 0.3 AML other m 2020-07-08T01:20:56.85
IV.RONT.HHN. ML:1.4 8.1596295E-5 1.74 AML other m 2020-07-08T01:20:57.00
IV.BRIS.HNE. ML:1.4 0.0001120399 0.6504 AML other m 2020-07-08T01:20:59.75
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
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Type Description Link
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