Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 23-01-2021 and time 18:00:29 (UTC) in region 2 km N Loro Piceno (MC)

A magnitude ML 1.7 earthquake occured in region: 2 km N Loro Piceno (MC), on

  • 23-01-2021 18:00:29 (UTC)
  • 23-01-2021 19:00:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1830, 13.4180 at 21 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
Loro Piceno MC 2 2401 2401
Urbisaglia MC 4 2628 5029
Mogliano MC 5 4696 9725
Colmurano MC 5 1263 10988
Petriolo MC 6 1998 12986
Massa Fermana FM 6 963 13949
Ripe San Ginesio MC 6 852 14801
Montappone FM 7 1682 16483
Monte Vidon Corrado FM 9 731 17214
Sant'Angelo in Pontano MC 9 1436 18650
Falerone FM 9 3337 21987
Francavilla d'Ete FM 10 964 22951
Corridonia MC 11 15430 38381
Pollenza MC 11 6618 44999
Tolentino MC 11 20069 65068
Montegiorgio FM 11 6851 71919
San Ginesio MC 12 3498 75417
Servigliano FM 13 2336 77753
Monte San Pietrangeli FM 13 2458 80211
Camporotondo di Fiastrone MC 14 563 80774
Macerata MC 14 42473 123247
Penna San Giovanni MC 14 1108 124355
Belmonte Piceno FM 14 646 125001
Gualdo MC 14 815 125816
Rapagnano FM 14 2145 127961
Magliano di Tenna FM 15 1452 129413
Belforte del Chienti MC 15 1886 131299
Cessapalombo MC 15 512 131811
Torre San Patrizio FM 15 2048 133859
Monte San Giusto MC 16 8191 142050
Caldarola MC 16 1823 143873
Treia MC 17 9403 153276
Monte San Martino MC 17 765 154041
Grottazzolina FM 17 3398 157439
Monsampietro Morico FM 17 659 158098
Monteleone di Fermo FM 18 395 158493
Montegranaro FM 18 12990 171483
Serrapetrona MC 19 966 172449
Sarnano MC 19 3264 175713
Montottone FM 19 979 176692
Santa Vittoria in Matenano FM 19 1330 178022
Smerillo FM 20 365 178387
Morrovalle MC 20 10195 188582

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km S of Ancona (100861 inhabitants)
63 Km NW of Teramo (54892 inhabitants)
63 Km E of Foligno (57155 inhabitants)
80 Km SE of Fano (60888 inhabitants)
84 Km E of Perugia (166134 inhabitants)
91 Km SE of Pesaro (94582 inhabitants)
92 Km N of L'Aquila (69753 inhabitants)
93 Km NE of Terni (111501 inhabitants)
95 Km NW of Montesilvano (53738 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 1.7 2021-01-23
18:00:29		 43.1827 13.4182 21 2021-07-12
16:54:57		 Bollettino Sismico Italiano INGV 86802431
Reviewed
Rev100 		ML 1.7 2021-01-23
18:00:28		 43.2007 13.3983 23 2021-01-23
18:10:21		 Sala Sismica INGV-Roma 86504691
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-23 18:00:29 ± 0.18
Latitude 43.1827 ± 0.0063
Longitude 13.4182 ± 0.0111
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86802431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 794
Semi-minor axis of confidence ellipse (meter) 531
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 233
Circular confidence region, given by single value of horizontal uncertainty (meter) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 173
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.05846
Epicentral distance of station farthest from the epicenter (degree) 0.57107
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:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 86802431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-05 16:36:54

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 86504691
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-23 18:10:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASSB.HHZ. 2021-01-23T18:00:49.50 0.6 undecidable manual S 256 63.3921 101 0.77 38
IV.ARVD.HHE. 2021-01-23T18:00:46.24 0.6 undecidable manual S 312 52.0035 104 0.49 42
IV.NRCA.HHZ. 2021-01-23T18:00:44.40 0.6 undecidable manual S 213 45.9207 107 0.21 47
IV.EL6.EHE. 2021-01-23T18:00:40.55 0.6 undecidable manual S 303 30.3474 117 0.24 47
IV.ASSB.HHZ. 2021-01-23T18:00:40.40 0.1 undecidable manual P 256 63.3921 101 -0.03 93
IV.FDMO.HHZ. 2021-01-23T18:00:40.51 0.6 undecidable manual S 239 31.3464 116 -0.04 49
IV.CING.HNZ. 2021-01-23T18:00:39.62 0.6 undecidable manual S 320 27.9498 119 -0.14 49
IV.ARVD.HHE. 2021-01-23T18:00:39.04 0.3 undecidable manual P 312 52.0035 104 0.33 66
IV.MF5.EHZ. 2021-01-23T18:00:38.86 0.6 undecidable manual S 171 21.867 127 0.46 46
IV.MNTT.EHZ. 2021-01-23T18:00:38.92 0.6 undecidable manual S 133 19.6692 131 0.99 37
IV.CSP1.EHZ. 2021-01-23T18:00:37.92 0.6 undecidable manual S 240 19.9689 130 -0.08 50
IV.NRCA.HHZ. 2021-01-23T18:00:37.53 0.3 undecidable manual P 213 45.9207 107 -0.27 68
IV.GUMA.HNN. 2021-01-23T18:00:37.07 0.3 undecidable manual S 207 14.874 140 0.03 76
IV.FDMO.HHZ. 2021-01-23T18:00:35.40 0.1 undecidable manual P 239 31.3464 116 -0.3 93
IV.MNTP.HNZ. 2021-01-23T18:00:35.74 0.6 undecidable manual S 141 6.4935 161 -0.18 50
IV.EL6.EHE. 2021-01-23T18:00:35.38 0.3 undecidable manual P 303 30.3474 117 -0.18 72
IV.MNTT.EHZ. 2021-01-23T18:00:34.38 0.1 negative manual P 133 19.6692 131 0.19 97
IV.CING.HNZ. 2021-01-23T18:00:34.90 0.1 undecidable manual P 320 27.9498 119 -0.34 93
IV.MF5.EHZ. 2021-01-23T18:00:34.50 0.1 undecidable manual P 171 21.867 127 0.04 100
IV.GUMA.HNN. 2021-01-23T18:00:33.50 0.3 undecidable manual P 207 14.874 140 -0.18 73
IV.CSP1.EHZ. 2021-01-23T18:00:33.95 0.1 undecidable manual P 240 19.9689 130 -0.28 95
IV.MNTP.HNZ. 2021-01-23T18:00:32.71 0.3 undecidable manual P 141 6.4935 161 -0.31 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHE. ML:1.7 0.00027219970000000006 1.7344 AML other m 2021-01-23T18:00:37.07
IV.CSP1.EHN. ML:1.6 0.0002216733 0.2912 AML other m 2021-01-23T18:00:38.16
IV.MNTT.EHE. ML:2.5 0.0018572515 1.8336 AML other m 2021-01-23T18:00:40.08
IV.MNTT.EHN. ML:2.1 0.000775 0.18 AML other m 2021-01-23T18:00:40.09
IV.FDMO.HHN. ML:1.3 0.000076975275 0.1312 AML other m 2021-01-23T18:00:41.62
IV.NRCA.HHN. ML:1.5 0.0000868 0.12 AML other m 2021-01-23T18:00:45.44
IV.NRCA.HNE. ML:1.8 0.00017229355 1.5488 AML other m 2021-01-23T18:00:45.93
IV.NRCA.HHE. ML:1.6 0.00011135000000000001 0.42 AML other m 2021-01-23T18:00:46.56
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