Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 12-09-2021 and time 23:56:51 (UTC) in region Costa Marchigiana Anconetana (Ancona)

A magnitude ML 1.5 earthquake occured in region: Costa Marchigiana Anconetana (Ancona), on

  • 12-09-2021 23:56:51 (UTC)
  • 13-09-2021 01:56:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8640, 13.3640 at 10 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

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Fano (60888 inhabitants)
30 Km NW of Ancona (100861 inhabitants)
36 Km E of Pesaro (94582 inhabitants)
68 Km E of Rimini (147750 inhabitants)
95 Km E of Cesena (96758 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 1.5 2021-09-12
23:56:51		 43.864 13.3637 10 2022-03-30
13:04:07		 Bollettino Sismico Italiano INGV 95661971
Reviewed
Rev100 		ML 1.5 2021-09-12
23:56:51		 43.8652 13.4058 9 2021-09-13
00:09:33		 Sala Sismica INGV-Roma 95362991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-12 23:56:51 ± 0.34
Latitude 43.8640 ± 0.0144
Longitude 13.3637 ± 0.0112
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95661971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1656
Semi-minor axis of confidence ellipse (meter) 870
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 192
Circular confidence region, given by single value of horizontal uncertainty (meter) 1660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 256
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.18436
Epicentral distance of station farthest from the epicenter (degree) 0.96407
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 7
Type of magnitude ML
Reference to an origin 95362991
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-13 00:09:33

ML:1.5

Field Value
Value 1.5
Uncertainty 0.4
Num. used stations 7
Type of magnitude ML
Reference to an origin 95661971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-09-20 11:42:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMO1.EHZ. 2021-09-12T23:57:10.59 0.3 undecidable manual P 182 107.0151 50 0.58 56
IV.CING.HHZ. 2021-09-12T23:57:09.81 0.6 undecidable manual S 194 55.7997 50 0.26 45
IV.ARVD.HHZ. 2021-09-12T23:57:08.17 0.3 undecidable manual S 220 52.9026 50 -0.58 63
IV.FDMO.HHZ. 2021-09-12T23:57:07.86 0.3 undecidable manual P 194 94.4388 50 -0.21 64
IV.MNTT.EHZ. 2021-09-12T23:57:07.84 0.3 undecidable manual P 168 90.9423 50 0.32 63
IV.CSP1.EHZ. 2021-09-12T23:57:06.93 0.3 undecidable manual P 189 86.6466 50 0.07 67
IV.COR1.EHZ. 2021-09-12T23:57:05.70 0.3 undecidable manual S 229 38.8278 50 0.68 62
IV.CRTC.HHZ. 2021-09-12T23:57:05.17 0.3 undecidable manual S 255 39.9267 50 -0.13 72
IV.AOI.HHE. 2021-09-12T23:57:05.06 0.3 undecidable manual S 151 39.7269 50 -0.18 71
IV.CING.HHZ. 2021-09-12T23:57:01.83 0.3 undecidable manual P 194 55.7997 50 -0.29 68
IV.ARVD.HHZ. 2021-09-12T23:57:01.26 0.3 undecidable manual P 220 52.9026 50 -0.4 66
IV.COR1.EHZ. 2021-09-12T23:56:59.71 0.1 undecidable manual P 229 38.8278 50 0.21 94
IV.CRTC.HHZ. 2021-09-12T23:56:59.57 0.3 undecidable manual P 255 39.9267 50 -0.09 73
IV.SENI.EHZ. 2021-09-12T23:56:59.78 0.1 undecidable manual S 211 20.4684 116 -0.1 100
IV.AOI.HHE. 2021-09-12T23:56:59.20 0.3 undecidable manual P 151 39.7269 50 -0.43 68
IV.PCRO.HNE. 2021-09-12T23:56:58.74 0.6 undecidable manual P 155 31.4463 50 0.38 46
IV.SENI.EHZ. 2021-09-12T23:56:56.63 0.1 negative manual P 211 20.4684 116 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SENI.HNE. ML:2.1 0.00093228365 0.3872 AML other m 2021-09-12T23:57:00.23
IV.SENI.EHE. ML:1.5 0.00025097170000000003 0.72 AML other m 2021-09-12T23:57:01.05
IV.SENI.HNN. ML:2.2 0.0011449245 0.7584 AML other m 2021-09-12T23:57:04.01
IV.SENI.EHN. ML:1.5 0.00022691214999999998 1.0464 AML other m 2021-09-12T23:57:06.90
IV.CING.HHE. ML:1.2 0.000033613275 0.3264 AML other m 2021-09-12T23:57:13.69
IV.CRTC.HHE. ML:1.4 0.00008850393500000001 0.8704 AML other m 2021-09-12T23:57:15.41
IV.ARVD.HHE. ML:1.0 0.000023504055000000004 1.3024 AML other m 2021-09-12T23:57:19.24
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