Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.5 on date 18-10-2021 and time 18:21:18 (UTC) in region 2 km N Loro Piceno (MC)

A magnitude ML 0.5 earthquake occured in region: 2 km N Loro Piceno (MC), on

  • 18-10-2021 18:21:18 (UTC)
  • 18-10-2021 20:21:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1840, 13.4160 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 3 2628 5029
Colmurano MC 5 1263 6292
Mogliano MC 5 4696 10988
Petriolo MC 6 1998 12986
Ripe San Ginesio MC 6 852 13838
Massa Fermana FM 6 963 14801
Montappone FM 7 1682 16483
Monte Vidon Corrado FM 9 731 17214
Sant'Angelo in Pontano MC 9 1436 18650
Falerone FM 10 3337 21987
Francavilla d'Ete FM 10 964 22951
Corridonia MC 11 15430 38381
Tolentino MC 11 20069 58450
Pollenza MC 11 6618 65068
San Ginesio MC 12 3498 68566
Montegiorgio FM 12 6851 75417
Servigliano FM 13 2336 77753
Camporotondo di Fiastrone MC 13 563 78316
Macerata MC 13 42473 120789
Monte San Pietrangeli FM 13 2458 123247
Penna San Giovanni MC 14 1108 124355
Gualdo MC 14 815 125170
Belmonte Piceno FM 14 646 125816
Belforte del Chienti MC 15 1886 127702
Rapagnano FM 15 2145 129847
Magliano di Tenna FM 15 1452 131299
Cessapalombo MC 15 512 131811
Torre San Patrizio FM 16 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
Serrapetrona MC 18 966 159459
Montegranaro FM 19 12990 172449
Sarnano MC 19 3264 175713
Santa Vittoria in Matenano FM 19 1330 177043
Montottone FM 19 979 178022
Morrovalle MC 20 10195 188217
San Severino Marche MC 20 12726 200943
Smerillo FM 20 365 201308

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)
90 Km SE of Pesaro (94582 inhabitants)
93 Km N of L'Aquila (69753 inhabitants)
93 Km NE of Terni (111501 inhabitants)
96 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 		Md 1.4
ML 0.5 		2021-10-18
18:21:18		 43.184 13.4155 11 2022-03-30
13:04:37		 Bollettino Sismico Italiano INGV 101051601
Reviewed
Rev100 		Md 1.4
ML 0.5 		2021-10-18
18:21:17		 43.2122 13.4217 11 2021-10-18
18:37:14		 Sala Sismica INGV-Roma 96734021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-18 18:21:18 ± 0.2
Latitude 43.1840 ± 0.0063
Longitude 13.4155 ± 0.0136
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 101051601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1151
Semi-minor axis of confidence ellipse (meter) 596
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 211
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.13490
Epicentral distance of station farthest from the epicenter (degree) 0.31836
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 96734021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 18:37:14

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 101051601
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-16 14:35:07

Md:1.4

Field Value
Value 1.4
Uncertainty 0.9
Num. used stations 3
Type of magnitude Md
Reference to an origin 96734021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-18 18:37:14

Md:1.4

Field Value
Value 1.4
Uncertainty 0.9
Num. used stations 3
Type of magnitude Md
Reference to an origin 101051601
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-16 14:35:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MC2.EHZ. 2021-10-18T18:21:30.38 0.6 undecidable manual S 211 35.3424 50 -0.07 50
IV.FDMO.HHZ. 2021-10-18T18:21:29.24 0.6 undecidable manual S 238 31.2465 50 -0.1 50
IV.EL6.EHE. 2021-10-18T18:21:29.43 0.6 undecidable manual S 303 30.0477 50 0.4 47
IV.CING.HNZ. 2021-10-18T18:21:28.65 0.6 undecidable manual S 320 27.6501 50 0.24 49
IV.MF5.EHZ. 2021-10-18T18:21:27.14 0.6 undecidable manual S 171 22.0668 50 0.24 49
IV.CSP1.EHZ. 2021-10-18T18:21:26.31 0.6 undecidable manual S 239 19.869 118 0.08 51
IV.PF6.EHZ. 2021-10-18T18:21:25.88 0.6 undecidable manual S 254 18.5703 119 0.03 52
IV.GUMA.HNN. 2021-10-18T18:21:25.35 0.6 undecidable manual S 206 14.9739 125 0.58 46
IV.MC2.EHZ. 2021-10-18T18:21:25.70 0.3 undecidable manual P 211 35.3424 50 0.33 71
IV.FDMO.HHZ. 2021-10-18T18:21:24.25 0.1 undecidable manual P 238 31.2465 50 -0.48 92
IV.EL6.EHE. 2021-10-18T18:21:24.80 0.3 undecidable manual P 303 30.0477 50 0.25 73
IV.MF5.EHZ. 2021-10-18T18:21:23.16 0.1 undecidable manual P 171 22.0668 50 -0.16 100
IV.CING.HNZ. 2021-10-18T18:21:23.99 0.3 undecidable manual P 320 27.6501 50 -0.2 74
IV.CSP1.EHZ. 2021-10-18T18:21:22.72 0.1 undecidable manual P 239 19.869 118 -0.22 99
IV.GUMA.HNN. 2021-10-18T18:21:22.25 0.3 undecidable manual P 206 14.9739 125 0.16 76
IV.PF6.EHZ. 2021-10-18T18:21:22.48 0.1 undecidable manual P 254 18.5703 119 -0.24 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSP1.EHN. ML:0.5 0.000025592829499999997 0.0768 AML other m 2021-10-18T18:21:27.04
IV.CSP1.EHE. ML:0.7 0.000039072485 0.4768 AML other m 2021-10-18T18:21:28.24
IV.FDMO.HHE. ML:0.3 0.000010614183 0.128 AML other m 2021-10-18T18:21:29.29
IV.FDMO.HHN. ML:0.3 0.000009281592500000002 0.1024 AML other m 2021-10-18T18:21:29.68
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