Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 25-03-2023 and time 23:45:17 (UTC) in region 2 km NW Pollenza (MC)

A magnitude ML 1.0 earthquake occured in region: 2 km NW Pollenza (MC), on

  • 25-03-2023 23:45:17 (UTC)
  • 26-03-2023 00:45:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2860, 13.3340 at 9 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
Pollenza MC 2 6618 6618
Treia MC 3 9403 16021
Appignano MC 9 4213 20234
Tolentino MC 9 20069 40303
Macerata MC 10 42473 82776
Urbisaglia MC 11 2628 85404
Montecassiano MC 12 7125 92529
Petriolo MC 13 1998 94527
Cingoli MC 14 10352 104879
Colmurano MC 14 1263 106142
San Severino Marche MC 14 12726 118868
Loro Piceno MC 15 2401 121269
Corridonia MC 15 15430 136699
Belforte del Chienti MC 16 1886 138585
Ripe San Ginesio MC 16 852 139437
Mogliano MC 16 4696 144133
Montefano MC 17 3541 147674
Serrapetrona MC 17 966 148640
Filottrano AN 17 9499 158139
Camporotondo di Fiastrone MC 18 563 158702
Caldarola MC 19 1823 160525
Massa Fermana FM 19 963 161488
San Ginesio MC 20 3498 164986
Francavilla d'Ete FM 20 964 165950
Montappone FM 20 1682 167632

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km SW of Ancona (100861 inhabitants)
63 Km NE of Foligno (57155 inhabitants)
67 Km SE of Fano (60888 inhabitants)
76 Km NW of Teramo (54892 inhabitants)
77 Km SE of Pesaro (94582 inhabitants)
79 Km E of Perugia (166134 inhabitants)
98 Km NE of Terni (111501 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 1.0 2023-03-25
23:45:17		 43.2865 13.3335 9 2024-03-01
17:18:19		 Bollettino Sismico Italiano INGV 124176931
Reviewed
Rev100 		ML 1.1 2023-03-25
23:45:17		 43.2977 13.3437 9 2023-03-25
23:52:18		 Sala Sismica INGV-Roma 115733841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-25 23:45:17 ± 0.12
Latitude 43.2865 ± 0.0063
Longitude 13.3335 ± 0.0086
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 124176931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 633
Semi-minor axis of confidence ellipse (meter) 510
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.13400
Epicentral distance of station farthest from the epicenter (degree) 0.78151
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 124176931
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-12-21 14:59:15

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 115733841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-25 23:52:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RM33.HNZ. 2023-03-25T23:45:45.73 0.6 undecidable manual S 186 86.7465 50 1.82 21
IV.PIEI.HHZ. 2023-03-25T23:45:40.83 0.6 undecidable manual S 294 70.0743 50 1.39 28
IV.SMA1.EHZ. 2023-03-25T23:45:40.92 0.6 undecidable manual S 180 72.7716 50 0.75 39
IV.RM33.HNZ. 2023-03-25T23:45:33.66 0.3 undecidable manual P 186 86.7465 50 0.76 56
IV.ARVD.HHZ. 2023-03-25T23:45:31.75 0.6 undecidable manual S 307 39.3273 50 0.5 45
IV.MF5.EHZ. 2023-03-25T23:45:30.64 0.6 undecidable manual S 163 34.6431 50 0.64 43
IV.SMA1.EHZ. 2023-03-25T23:45:30.04 0.3 undecidable manual P 180 72.7716 50 -0.7 59
IV.MML1.EHZ. 2023-03-25T23:45:30.40 0.6 undecidable manual S 237 35.0427 50 0.31 48
IV.AOI.HHE. 2023-03-25T23:45:30.30 0.6 undecidable manual S 36 36.3414 50 -0.16 49
IV.PIEI.HHZ. 2023-03-25T23:45:30.63 0.3 undecidable manual P 294 70.0743 50 0.31 67
IV.MNTT.EHZ. 2023-03-25T23:45:30.41 0.6 undecidable manual S 139 32.745 50 0.93 38
IV.FDMO.HHZ. 2023-03-25T23:45:29.61 0.6 undecidable manual S 216 34.1436 50 -0.25 48
IV.CSP1.EHZ. 2023-03-25T23:45:27.00 0.6 undecidable manual S 206 23.9538 111 0.24 49
IV.NRCA.HHZ. 2023-03-25T23:45:27.16 0.1 undecidable manual P 200 53.3022 50 -0.58 86
IV.PP3.HNN. 2023-03-25T23:45:27.29 0.6 undecidable manual S 65 24.4533 111 0.37 48
IV.ARVD.HHZ. 2023-03-25T23:45:25.19 0.3 undecidable manual P 307 39.3273 50 -0.4 69
IV.EL6.EHZ. 2023-03-25T23:45:25.72 0.6 undecidable manual S 284 19.2696 115 0.44 48
IV.MMO1.EHZ. 2023-03-25T23:45:25.45 0.3 undecidable manual P 181 42.9237 50 -0.69 63
IV.MNTP.HNZ. 2023-03-25T23:45:25.84 0.6 undecidable manual S 146 19.869 115 0.4 48
IV.CESI.HHZ. 2023-03-25T23:45:25.82 0.3 undecidable manual P 228 46.7199 50 -0.9 57
IV.FDMO.HHZ. 2023-03-25T23:45:24.41 0.3 undecidable manual P 216 34.1436 50 -0.38 70
IV.MNTT.EHZ. 2023-03-25T23:45:24.47 0.1 undecidable manual P 139 32.745 50 -0.1 100
IV.MF5.EHZ. 2023-03-25T23:45:24.60 0.3 undecidable manual P 163 34.6431 50 -0.27 72
IV.CING.HHZ. 2023-03-25T23:45:24.04 0.6 undecidable manual S 312 14.874 122 0.11 51
IV.MML1.EHZ. 2023-03-25T23:45:24.57 0.3 undecidable manual P 237 35.0427 50 -0.35 71
IV.AOI.HHE. 2023-03-25T23:45:24.85 0.3 undecidable manual P 36 36.3414 50 -0.28 72
IV.PP3.HNN. 2023-03-25T23:45:23.25 0.3 undecidable manual P 65 24.4533 111 0.16 75
IV.MNTP.HNZ. 2023-03-25T23:45:22.00 0.3 undecidable manual P 146 19.869 115 -0.24 74
IV.EL6.EHZ. 2023-03-25T23:45:22.15 0.3 undecidable manual P 284 19.2696 115 0.01 78
IV.CSP1.EHZ. 2023-03-25T23:45:22.95 0.3 undecidable manual P 206 23.9538 111 -0.05 77
IV.CING.HHZ. 2023-03-25T23:45:21.34 0.3 undecidable manual P 312 14.874 122 -0.02 79
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CING.HHN. ML:0.9 0.00007764999999999999 0.96 AML other m 2023-03-25T23:45:24.43
IV.CING.HHE. ML:0.9 0.0000856 0.56 AML other m 2023-03-25T23:45:25.38
IV.FDMO.HHE. ML:1.1 0.00005405 1.82 AML other m 2023-03-25T23:45:29.04
IV.FDMO.HHN. ML:0.9 0.000034049999999999994 1.84 AML other m 2023-03-25T23:45:29.99
IV.MML1.EHN. ML:1.0 0.0000394 0.6 AML other m 2023-03-25T23:45:30.40
IV.MML1.EHE. ML:0.9 0.0000328 1.38 AML other m 2023-03-25T23:45:31.72
IV.CESI.HHE. ML:0.9 0.0000262 0.7 AML other m 2023-03-25T23:45:34.38
IV.CESI.HHN. ML:1.1 0.00003685 0.5 AML other m 2023-03-25T23:45:35.51
IV.NRCA.HHE. ML:1.3 0.00004595 0.16 AML other m 2023-03-25T23:45:36.32
IV.NRCA.HHN. ML:1.3 0.0000518 1.2 AML other m 2023-03-25T23:45:38.75
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