Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 16-08-2021 and time 15:55:15 (Italy) in region 1 km NE Serra Sant'Abbondio (PU)

A magnitude ML 1.3 earthquake occured in region: 1 km NE Serra Sant'Abbondio (PU), on

  • 16-08-2021 13:55:15 (UTC)
  • 16-08-2021 15:55:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4980, 12.7760 at 15 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
Serra Sant'Abbondio PU 1 1027 1027
Frontone PU 4 1300 2327
Pergola PU 9 6333 8660
Sassoferrato AN 10 7285 15945
Cagli PU 12 8731 24676
Cantiano PU 12 2245 26921
Arcevia AN 13 4612 31533
Scheggia e Pascelupo PG 14 1393 32926
Genga AN 15 1797 34723
Acqualagna PU 16 4393 39116
Costacciaro PG 16 1216 40332
Fratte Rosa PU 18 966 41298
San Lorenzo in Campo PU 18 3414 44712
Sigillo PG 19 2404 47116

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km SW of Fano (60888 inhabitants)
47 Km S of Pesaro (94582 inhabitants)
54 Km NE of Perugia (166134 inhabitants)
61 Km N of Foligno (57155 inhabitants)
61 Km W of Ancona (100861 inhabitants)
65 Km S of Rimini (147750 inhabitants)
72 Km E of Arezzo (99543 inhabitants)
83 Km SE of Cesena (96758 inhabitants)
100 Km SE of Forlì (117913 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 2021-08-16
13:55:15		 43.498 12.7763 15 2021-12-29
11:12:21		 Bollettino Sismico Italiano INGV 94420481
Reviewed
Rev100 		ML 1.3 2021-08-16
13:55:15		 43.5008 12.7807 15 2021-08-16
14:02:06		 Sala Sismica INGV-Roma 94257051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-16 13:55:15 ± 0.06
Latitude 43.4980 ± 0.0018
Longitude 12.7763 ± 0.0037
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 94420481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 265
Semi-minor axis of confidence ellipse (meter) 90
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 234
Circular confidence region, given by single value of horizontal uncertainty (meter) 270.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51351
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 19
Type of magnitude ML
Reference to an origin 94420481
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-08-20 13:46:35

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 94257051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-16 14:02:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-08-16T13:55:26.03 0.3 undecidable manual P 142 56.7987 95 0.2 66
IV.COR1.EHZ. 2021-08-16T13:55:26.20 3.0 undecidable manual P 0
IV.FDMO.HHZ. 2021-08-16T13:55:25.80 0.3 undecidable manual P 154 56.9985 95 -0.06 68
IV.FOSV.EHZ. 2021-08-16T13:55:24.17 0.1 undecidable manual S 183 22.5552 108 -0.1 95
IV.PIEI.HHZ. 2021-08-16T13:55:23.56 0.1 undecidable manual S 282 19.869 112 -0.04 97
IV.NARO.HHZ. 2021-08-16T13:55:23.50 0.1 undecidable manual S 309 20.1687 112 -0.16 95
IV.ATBU.HNZ. 2021-08-16T13:55:23.83 0.6 undecidable manual S 262 18.5703 115 0.56 43
IV.MPAG.EHZ. 2021-08-16T13:55:22.43 0.1 undecidable manual S 355 14.5743 123 0.07 97
IV.ARVD.HHZ. 2021-08-16T13:55:22.12 0.1 undecidable manual S 90 13.2756 127 0.06 98
IV.ATCC.EHZ. 2021-08-16T13:55:22.72 0.1 undecidable manual P 198 36.4413 99 0.02 95
IV.EL6.EHZ. 2021-08-16T13:55:21.56 3.0 undecidable manual P -0.47 0
IV.ATSC.EHZ. 2021-08-16T13:55:21.64 0.1 undecidable manual S 221 10.9779 134 0.05 99
IV.ATPC.HNZ. 2021-08-16T13:55:21.16 0.1 undecidable manual P 266 25.752 105 0.06 96
IV.FRON.EHZ. 2021-08-16T13:55:20.54 0.1 undecidable manual S 298 4.5954 159 -0.11 99
IV.ATBU.HNZ. 2021-08-16T13:55:20.21 0.1 undecidable manual P 262 18.5703 115 0.17 95
IV.SSFR.HNZ. 2021-08-16T13:55:20.90 0.1 undecidable manual S 176 6.8931 149 -0.01 100
IV.FOSV.EHZ. 2021-08-16T13:55:20.48 0.1 undecidable manual P 183 22.5552 108 -0.14 95
IV.PIEI.HHZ. 2021-08-16T13:55:20.06 0.1 undecidable manual P 282 19.869 112 -0.17 95
IV.NARO.HHZ. 2021-08-16T13:55:20.13 0.1 undecidable manual P 309 20.1687 112 -0.14 96
IV.ARVD.HHZ. 2021-08-16T13:55:19.38 0.1 undecidable manual P 90 13.2756 127 0.03 98
IV.MPAG.EHZ. 2021-08-16T13:55:19.48 0.1 undecidable manual P 355 14.5743 123 -0.03 99
IV.ATSC.EHZ. 2021-08-16T13:55:19.09 0.1 undecidable manual P 221 10.9779 134 0.02 99
IV.FRON.EHZ. 2021-08-16T13:55:18.56 0.1 undecidable manual P 298 4.5954 159 0.03 100
IV.SSFR.HNZ. 2021-08-16T13:55:18.67 0.1 undecidable manual P 176 6.8931 149 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FRON.EHE. ML:1.2 0.00020500000000000002 0.06 AML other m 2021-08-16T13:55:20.69
IV.SSFR.HNN. ML:2.0 0.001044 1.7 AML other m 2021-08-16T13:55:20.92
IV.SSFR.HHN. ML:1.7 0.0005809999999999999 0.9 AML other m 2021-08-16T13:55:20.92
IV.SSFR.HHE. ML:1.7 0.0005355000000000001 0.06 AML other m 2021-08-16T13:55:20.92
IV.FRON.EHN. ML:1.3 0.00023299999999999997 1.58 AML other m 2021-08-16T13:55:21.00
IV.SSFR.HNE. ML:1.9 0.0009690000000000001 0.04 AML other m 2021-08-16T13:55:21.39
IV.ARVD.HHE. ML:1.3 0.000158 0.14 AML other m 2021-08-16T13:55:22.21
IV.ARVD.HHN. ML:1.1 0.000108 0.3 AML other m 2021-08-16T13:55:22.43
IV.MPAG.EHE. ML:1.3 0.000168 0.36 AML other m 2021-08-16T13:55:22.69
IV.MPAG.EHN. ML:1.3 0.0001515 0.34 AML other m 2021-08-16T13:55:22.53
IV.NARO.HHE. ML:1.4 0.0001535 0.1 AML other m 2021-08-16T13:55:23.64
IV.NARO.HHN. ML:1.2 0.00010065 0.18 AML other m 2021-08-16T13:55:23.72
IV.PIEI.HHE. ML:1.0 0.0000605 0.72 AML other m 2021-08-16T13:55:23.46
IV.FOSV.EHE. ML:0.9 0.0000479 0.24 AML other m 2021-08-16T13:55:24.46
IV.FOSV.EHN. ML:0.8 0.0000394 0.66 AML other m 2021-08-16T13:55:25.40
IV.FDMO.HHE. ML:1.1 0.000024299999999999998 1 AML other m 2021-08-16T13:55:34.83
IV.CSP1.EHE. ML:1.4 0.000057570000000000006 1.48 AML other m 2021-08-16T13:55:35.12
IV.FDMO.HHN. ML:0.8 0.0000156 1.56 AML other m 2021-08-16T13:55:36.10
IV.CSP1.EHN. ML:1.4 0.00005534 0.82 AML other m 2021-08-16T13:55:36.33
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